CVE-2026-76461Active Exploitation(cisco / asyncos)

CRITICALCVSS 9.8 · CRITICALCISA KEV

Exploitation observed; activity peaked at 108 mentions and remains active

Immediate actions

Patch cisco asyncos systems immediately
Assume compromise if assets are exposed
Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft

Recommended action window: Immediate (within 24h)

NVD description

A vulnerability in the email parsing of Cisco AsyncOS Software for Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to execute arbitrary commands with root privileges on the underlying operating system. This vulnerability is due to insufficient validation in the email parsing logic. An attacker could exploit this vulnerability by sending a crafted email message that contains malicious SQL statements through an affected device. A successful exploit could allow the attacker to execute arbitrary SQL statements, leading to command execution with root privileges on the underlying operating system.

cisco CVEs Back to dashboard

9.5/ 10 priority

Sources & remediation

Listed in the CISA Known Exploited Vulnerabilities catalog. Federal remediation due date: 2026-09-17. Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Vendor / third-party advisories

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX

Other references

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76461

Weakness type (CWE)

CWE-89

Priority

CRITICAL

Exploitation

ACTIVE

PoC

YES

Patch

AVAILABLE

Momentum

DECLINING

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

asyncos
secure_email_gateway_c195
secure_email_gateway_c395
secure_email_gateway_c695

Threat summary

Active exploitation appears in 206 classified signals
Public PoC and exploit tooling are both present
Patch or workaround signal is available
252 mentions across 22 observed days

What's happening

Active exploitation reported across 206 signals
Exploit tool or code specified in 2 signals
PoC mentioned or linked in 6 signals
Patch or workaround mentioned in 138 signals
Technical details provided in 214 signals
Disclosure: 24 classified signals
Peaked 20d ago at 108 mentions (2026-09-15); latest day: 2
252 total mentions across 22 days

Affected systems

Vendors

cisco

Products

asyncossecure_email_gateway_c195secure_email_gateway_c395secure_email_gateway_c695secure_email_gateway_virtual_appliance_c100vsecure_email_gateway_virtual_appliance_c300vsecure_email_gateway_virtual_appliance_c600v

1 version affected across 7 products

Deep dive

Activity timeline252 mentions / 22d

Signal classification4 categories

Active Exploitation

20681.7%

Disclosure

249.5%

Patch

166.3%

General

62.4%

Referenced assets151 URLs

By indicator

Classification over time

Date	Total	Labels

2026-09-14	11	Active Exploitation8Disclosure1Patch2
2026-09-15	108	Active Exploitation93Disclosure10General1Patch4
2026-09-16	45	Active Exploitation35Disclosure5General1Patch4
2026-09-17	29	Active Exploitation21Disclosure4General3Patch1
2026-09-18	14	Active Exploitation12Disclosure1Patch1
2026-09-19	6	Active Exploitation5Patch1
2026-09-20	6	Active Exploitation6
2026-09-21	7	Active Exploitation5General1Patch1
2026-09-22	3	Active Exploitation1Disclosure1Patch1
2026-09-23	2	Active Exploitation1Patch1
2026-09-24	2	Active Exploitation2
2026-09-25	2	Active Exploitation2
2026-09-26	1	Active Exploitation1
2026-09-28	2	Active Exploitation2
2026-09-30	1	Active Exploitation1
2026-10-02	1	Active Exploitation1
2026-10-09	1	Active Exploitation1
2026-10-14	1	Active Exploitation1
2026-10-15	3	Active Exploitation2Disclosure1
2026-10-16	4	Active Exploitation4
2026-10-17	1	Active Exploitation1
2026-10-19	2	Active Exploitation1Disclosure1

Full discourse20 posts

国家サイバー統括室(注意・警戒情報)@cyber_forecast45d
Disclosure
【注意喚起】 2026年9月15日、Cisco Secure Email GatewayにおけるSQLインジェクションの脆弱性（CVE-2026-76461）に関する件として、JPCERT/CCが注意喚起をしています。ご確認ください。 https://x.com/jpcert/status/2099755850630090786
Post summary
The post alerts readers to CVE-2026-76461, described as a SQL injection vulnerability in Cisco Secure Email Gateway. It provides vulnerability type and affected product but no PoC, exploit tool, active exploitation claim, or remediation details.
51563670117142.2K
112.3K followersView on X
JPCERTコーディネーションセンター@jpcert45d
Active Exploitation
Cisco Secure Email GatewayにおけるSQLインジェクションの脆弱性（CVE-2026-76461）に関する注意喚起を公開。細工されたメールを受信することで、認証なしでroot権限の任意コマンドを実行される可能性あり。すでに悪用も確認済みです。対策と侵害調査を検討ください。^KK https://www.jpcert.or.jp/at/2026/at260027.html
Post summary
The text reports confirmed exploitation of CVE-2026-76461, a SQL injection vulnerability in Cisco Secure Email Gateway that may allow unauthenticated root command execution via crafted email. It provides technical impact details but does not name a patch, workaround, PoC, or exploit tool.
0451312031187.1K
37.3K followersView on X
The Hacker News@TheHackersNews45d
Active Exploitation
‼️ Attackers are exploiting a Cisco Secure Email Gateway vulnerability that can let a crafted email trigger command execution as root. Cisco has released fixes, and CISA added CVE-2026-76461 to its KEV catalog. How the attack works → https://thehackernews.com/2026/09/cisco-secure-email-gateway-flaw.html
Post summary
The text reports that CVE-2026-76461 in Cisco Secure Email Gateway is being actively exploited in the wild, allows root-level command execution via crafted emails, and has led to CISA adding it to the KEV catalog, with Cisco having released patches.
73331191937.7K
2.4M followersView on X
connect24h@connect24h45d
Active Exploitation
であえー！利用ユーザは祭りですわよ！リモートからわメール送るだけ。root権限で任意コマンド！使っている人は要注意。 Cisco Secure Email Gateway CVE-2026-76461 / CVSS 9.8 ・認証不要・ユーザー操作不要・細工したメールを送るだけ・SQL Injectionからroot権限で任意コマンド実行・構成に関係なく影響・回避策なし・2026年9月に実悪用確認済み対象はAsyncOS 16.5.0-780未満 16.0.4-302未満 15.5.5-014未満。さらに厄介なのが侵害調査。 rootを取られるため、 Secure Email Gateway自身のログやIoCを消される可能性がある。 CiscoもJPCERT/CCも、 mail_logsだけでなくFWや周辺NWログとの突合を推奨している。つまりこれは「パッチを当てれば終わり」ではない。該当バージョンなら、更新と同時に外部ログを使った侵害調査までセットで見たい。 https://www.jpcert.or.jp/at/2026/at260027.html
Post summary
The text reports CVE-2026-76461 as actively exploited with confirmed real-world attacks, providing technical details and recommending updates alongside incident investigation.
1333633021.8K
8.9K followersView on X
Ratan Jyoti@reach2ratan45d
Active Exploitation
🚨 CRITICAL 0-DAY ALERT: CVE-2026-76461 (CVSS 9.8). An unauthenticated remote code execution zero-day in Cisco Secure Email Gateway (AsyncOS) is actively exploited in the wild. Added to @CISAgov KEV today with a mandatory remediation deadline of Sept. 17! Vulnerability Breakdown A severe SQL injection and improper parsing flaw in AsyncOS email processing logic. Attackers send specially crafted inbound emails embedded with malicious SQL statements. When AsyncOS parses them, the SQL statements execute directly, elevating attackers to root-level OS execution on physical and virtual appliances. Compromise Identification & Forensics How to Identify Compromise: ⚠️ Warning: Root access allows threat actors to tamper with local logs to hide tracks. Prioritize external telemetry. Inspect mail_logs across all cluster nodes for suspicious SQL injection fragments (e.g., UNION, SELECT, stacked queries). Check firewall/NetFlow for unexpected outbound connections originating directly from the gateway. Look for anomalous parent-child processes spawned from mail processing daemons. Mitigation & Containment Steps Patch immediately: Apply the fixed Cisco AsyncOS release per the vendor advisory. Network Isolation: Restrict gateway management access exclusively to trusted internal jump boxes; never expose management interfaces to the internet. Rebuild if suspected: If exploitation is flagged, preserve volatile memory/forensics, deploy a clean instance, and revoke/rotate all certificates and API keys stored on the device. Key Indicators of Compromise (IOCs) Log Signatures: Malformed SQL syntax in mail_logs parsing headers/MIME components. Traffic Anomalies: Outbound HTTP/HTTPS or raw TCP sessions from the appliance to non-standard, external public IPs. Artifacts: Unscheduled cron jobs, unauthorized local user additions, or modified configuration backups. Hunting Rule (YARA) rule Exploit_CVE_2026_76461_Cisco_SEG { meta: description = "Detects SQLi payload patterns targeting Cisco Secure Email Gateway email parsing" author = "@reach2ratan" reference = "CVE-2026-76461" date = "2026-09-15" severity = "critical" strings: $sql_select = /(?i)SELECT\s+.*\s+FROM\s+/ ascii wide $sql_union = /(?i)UNION(\s+ALL)?\s+SELECT/ ascii wide $sql_exec = /(?i)(EXEC|EXECUTE)\s*\(.*(xp_cmdshell|pg_execute|system)/ ascii wide $mime_hdr = /(?i)(X-Mailer|Subject|Message-ID|From|To):/ ascii wide condition: filesize < 15MB and $mime_hdr and ($sql_union or ($sql_select and $sql_exec)) } Stay patched and hunt across historical gateway logs! 🛡️ @reach2ratan #CVE202676461 #CyberSecurity #InfoSec #ThreatIntel #ZeroDay
Post summary
Critical Cisco Secure Email Gateway zero-day (CVE-2026-76461, CVSS 9.8) via SQL injection to root RCE is actively exploited in the wild, listed on CISA KEV, with urgent patching demanded and detailed IOCs/yara rule provided.
31902981.3K
26.9K followersView on X
Rapid7@rapid745d
Patch
🚨 On 9/14/26, #Cisco published a security advisory for CVE-2026-76461 – a critical SQL injection vuln. affecting Cisco AsyncOS Software for Cisco Secure Email Gateway. More in our blog: https://r-7.co/4AfiBgS https://t.co/uAsml2PrDU
Post summary
The tweet announces Cisco's security advisory for CVE-2026-76461, a critical SQL injection flaw in Cisco AsyncOS Software for Secure Email Gateway, and points to a blog for further details.
21112495.3K
126.0K followersView on X
CISA Cyber@CISACyber46d
Active Exploitation
🛡️ We added Cisco Secure Email Gateway SQL injection vulnerability CVE-2026-76461 to our KEV Catalog. Visit https://go.dhs.gov/Z3Q & apply mitigations to protect your org from cyberattacks. #Cybersecurity #InfoSec https://t.co/ESrUbiR2qK
Post summary
The tweet announces the addition of CVE-2026-76461 to the CISA KEV catalog, confirming active exploitation, and urges organizations to apply mitigations for protection.
4922338.9K
303.3K followersView on X
Stephen Fewer@stephenfewer11d
Active Exploitation
Three new @metasploit exploit modules in the queue for several of the recent Cisco Secure Email Gateway vulns. Last weeks file write in AMP (CVE-2026-76519, on KEV), and two separate SQLi's (CVE-2026-76461, on KEV, and CVE-2026-76443) from last month: https://github.com/rapid7/metasploit-framework/pulls?q=is%3Apr+%22Cisco+Secure+Email+Gateway%22 https://t.co/DRwZxllrtr
Post summary
The text announces three new Metasploit exploit modules for Cisco Secure Email Gateway vulnerabilities, with two CVEs confirmed on CISA KEV indicating active exploitation, and describes the vulnerability types (file write and SQLi) for the affected CVEs.
05022111.6K
10.1K followersView on X
Ryx@PadhiyarRushi42d
Active Exploitation
Cisco Secure Email Gateway root RCE still has public PoC references. CVE-2026-76461 (CVSS 9.8): unauthenticated SQL injection in AsyncOS email parsing → OS command execution as root. Already on CISA KEV; exploit material continues to circulate. https://www.yazoul.net/advisory/cve/cve-2026-76461-cisco-secure-email-gateway-rce-exploited-poc/ #Cybersecurity #AI #AISecurity #MCP #Claude #GPT #Infosec #Trending #NetworkSecurity #RCE
Post summary
The tweet reports that CVE-2026-76461, a critical remote code execution vulnerability in Cisco Secure Email Gateway, is listed in CISA's Known Exploited Vulnerabilities catalog, confirming active exploitation, and notes the availability of public PoC references.
03021111.2K
954 followersView on X
VulnTracker@vuln_tracker45d
Active Exploitation
CVE-2026-76461 (CVSS 9.8): a crafted email with malicious SQL statements lets an unauthenticated attacker execute commands as root on Cisco Secure Email Gateway. No workaround exists. Added to CISA's KEV catalog on September 14. Update now. Details: https://vulntracker.io/cves/CVE-2026-76461 https://t.co/dOQJag6oXA
Post summary
CVE-2026-76461 is a CVSS 9.8 SQL-injection vulnerability on Cisco Secure Email Gateway enabling unauthenticated root RCE via malicious email, confirmed in CISA KEV with no workaround but an urgent update recommendation.
1301291.5K
823 followersView on X
情報の灯台@joho_no_todai45d
Patch
Ciscoのメールセキュリティゲートウェイにメール1通でroot権限を奪われるゼロデイが見つかった。 CVE-2026-76461、CVSS 9.8。 https://joho-todai.com/cisco-secure-email-gateway-zero-day-root-exploit/ 原因はメール解析処理のSQLインジェクション。認証不要、構成を問わず全機器が対象で、回避策はない。厄介なのは侵害後の話で、root権限を取った攻撃者はログを消せる。ゲートウェイ自体のログが証拠にならない。パッチはAsyncOS 16.5.0-780。 CISAは連邦機関に現地時間9月17日までの修正を義務づけている。
Post summary
The text discloses a high-severity Cisco email security gateway zero-day, CVE-2026-76461, caused by SQL injection leading to unauthenticated root compromise. The primary actionable takeaway is the named patch version, AsyncOS 16.5.0-780, and the CISA-mandated federal remediation deadline.
0301232.2K
12.8K followersView on X
Cytex@cytexsmb41d
Active Exploitation
Cisco Secure Email Gateway zero-day (CVE-2026-76461, CVSS 9.8): malformed email -> root RCE, no auth needed. CISA's federal patch deadline is Sept 17. Everyone else's deadline should be the same. AI governance means nothing on top of an unpatched mail gateway. https://t.co/a9hUSka0OS
Post summary
The tweet discloses a critical zero-day vulnerability (CVE-2026-76461) in Cisco Secure Email Gateway allowing unauthenticated root RCE, cites its presence on the CISA KEV catalog via the federal patch deadline, and urges immediate patching by September 17.
33152316
850 followersView on X
ボス@サイバーセキュリティの専門家@boss_sec_labo45d
Active Exploitation
Ciscoのメールゲートウェイに認証不要のゼロデイRCE、vCenterがランサムに包囲、Appleが200件超を一括修正—— 全部今日だ。担当者の月曜を、攻撃者は待ってくれない。・Cisco SEG CVE-2026-76461、認証不要SQLiでroot取得——JPCERT/CC緊急注意喚起・VMware vCenter CVE-2026-59310、ランサムが悪用中・Apple iOS 27/macOS 27、Kernelメモリ破損含む200件超を一括修正 CISAがKEVに追加するということは、既に悪用が始まっているということだ。君の現場で、今日中に対応が完了できるのは何本だ？月曜の朝報に「被害確認」と出てからでは遅い。
Post summary
The post emphasizes active exploitation, especially for VMware vCenter CVE-2026-59310 being exploited by ransomware and references CISA KEV as evidence exploitation has begun. It also mentions Apple iOS/macOS 27 fixes and technical vulnerability details, but no PoC or named exploit tool/code is provided.
020111916
1.7K followersView on X
SOCRadar®@socradar44d
Active Exploitation
Cisco Secure Email Gateway (CVE-2026-76461, CVSS 9.8) is under active exploitation. → Unauthenticated SQL injection via crafted email → Root-level OS command execution → Affects physical and virtual appliances → No workaround Upgrade to a fixed AsyncOS release now. Learn more: https://hubs.la/Q04xFQ3d0 #Cisco #CVE
Post summary
CVE-2026-76461 in Cisco Secure Email Gateway is reported as under active exploitation, with detailed technical impact and a recommended upgrade to a fixed AsyncOS release.
01055810
7.1K followersView on X
FastFoodRembrandt.onion@solminingpunk45d
Active Exploitation
‼️ Attackers are exploiting a @Cisco Secure Email Gateway vulnerability that can let a crafted email trigger command execution as root. Cisco has released fixes, and CISA added CVE-2026-76461 to its KEV catalog. #cybersecurity https://thehackernews.com/2026/09/cisco-secure-email-gateway-flaw.html
Post summary
Attackers are actively exploiting CVE-2026-76461, an RCE flaw in Cisco Secure Email Gateway triggered by crafted emails, prompting Cisco to release fixes and CISA to add the CVE to its Known Exploited Vulnerabilities catalog.
21080557
6.9K followersView on X
محمد الربيعي@1ms2540d
Active Exploitation
رسالة بريد واحدة قد تخترق بوابة Cisco بصلاحيات root أعلنت Cisco في 14 سبتمبر عن CVE-2026-76461 في Cisco Secure Email Gateway، وأكدت استغلالها فعليًا. يستطيع مهاجم غير مسجل إرسال رسالة بريد مصممة خصيصًا تؤدي إلى تنفيذ أوامر بصلاحيات root، دون أي تفاعل من المستخدم. لا يوجد حل مؤقت، وحدّثت Cisco التنبيه في 17 سبتمبر لتوضيح مخاطر الأجهزة العنقودية.
Post summary
The text reports that Cisco CVE-2026-76461 in Cisco Secure Email Gateway is being actively exploited, allowing an unauthenticated attacker to trigger root command execution via a crafted email. No PoC, exploit tool, patch, or workaround is specified.
040601.5K
18.4K followersView on X
にゃん☆たく/takumi.a@taku888infinity46d
Active Exploitation
・CVE-2026-76461 Cisco Secure Email Gateway SQL Injection Vulnerability https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX 『（直訳）Cisco Secure Email Gateway 用の Cisco AsyncOS ソフトウェアのメール解析機能に脆弱性があり、認証されていないリモート攻撃者が、基盤となるオペレーティングシステム上でルート権限で任意のコマンドを実行できる可能性』 →KEV追加・CVE-2026-20353/CVE-2026-76440/CVE-2026-76441/CVE-2026-76442/CVE-2026-76443 Cisco Secure Email Gateway and Secure Email and Web Manager Security Hardening Release: September 2026 https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-esa-dfCrfXkm 『（直訳）これらの脆弱性は、社内テスト中に発見されました。そのうちの1つは、実際に悪用されていることが確認されています。』
Post summary
The text reports multiple Cisco Secure Email Gateway CVEs, with CVE-2026-76461 added to CISA KEV and one CVE from the second group confirmed as actively exploited, while referencing vendor security advisories and hardening releases.
210521.9K
12.0K followersView on X
yuzuno_oobaka@yuzuno_oobaka42d
Disclosure
📦️ Cisco大量脆弱性公開とCVE-2026-76460についてって,もう遅いけどね,今必死作業している人,お疲れ様です頑張ってで,今週,Ciscoから立て続けに重大なセキュリティアドバイザリが出た先ずはSecure Email Gateway(AsyncOS)のゼロデイ(CVE-2026-76461) m(__)m🌾続 #CyberSecurity #Cisco #ISE
Post summary
The post notes Cisco's release of multiple serious security advisories, highlighting a zero‑day in Secure Email Gateway (AsyncOS) CVE-2026-76461, but provides no PoC, exploit, patch, or active exploitation details.
90000124
33 followersView on X
ProtAAPP - Protege las AAPP@ProtAAPP43d
Active Exploitation
Cisco advierte que atacantes explotan CVE-2026-76461 (CVSS 9.8) en su Secure Email Gateway para obtener root. CISA ya lo incluye en KEV y pide parchear antes del 17 sept. ¡Actualiza ya! https://www.securityweek.com/root-rce-zero-day-in-cisco-secure-email-gateway-under-active-exploitation/ https://t.co/xg3Eu8Y2a2
Post summary
The tweet alerts that CVE-2026-76461 (CVSS 9.8) in Cisco Secure Email Gateway is actively exploited in the wild to achieve root access, has been added to the CISA KEV catalog, and demands immediate patching before a September 17 deadline.
12040403
8.3K followersView on X
Ryx@PadhiyarRushi44d
Active Exploitation
Cisco Secure Email Gateway zero-day under active exploitation!! CVE-2026-76461 (CVSS 9.8): unauthenticated SQL injection via specially crafted email → arbitrary OS commands as root. CISA already added it to KEV with a short deadline. Email security appliances that parse inbound mail remain high-value targets when the parsing layer sits on the same host as the OS. https://www.securityweek.com/root-rce-zero-day-in-cisco-secure-email-gateway-under-active-exploitation/ #Cybersecurity #AI #AISecurity #MCP #Claude #GPT #Infosec #Trending #NetworkSecurity #RCE
Post summary
The text reports that CVE-2026-76461 in Cisco Secure Email Gateway is being actively exploited, with CISA KEV listing and technical details including high-severity SQL injection leading to root command execution. No PoC, named exploit tool, or patch is explicitly provided in the text.
01140515
954 followersView on X

CPE platform detail7 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

7 of 7 entries

Part	Vendor	Product	Version	Target SW	Target HW
OS	cisco	asyncos	-	-	-
HW	cisco	secure_email_gateway_c195	-	-	-
HW	cisco	secure_email_gateway_c395	-	-	-
HW	cisco	secure_email_gateway_c695	-	-	-
App	cisco	secure_email_gateway_virtual_appliance_c100v	-	-	-
App	cisco	secure_email_gateway_virtual_appliance_c300v	-	-	-
App	cisco	secure_email_gateway_virtual_appliance_c600v	-	-	-

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What researchers are saying

CVE-2026-76461

connect24h[verified]@connect24hActive Exploitation

The text reports CVE-2026-76461 as actively exploited with confirmed real-world attacks, providing technical details and recommending updates alongside incident investigation.

Ratan Jyoti[verified]@reach2ratanActive Exploitation

Critical Cisco Secure Email Gateway zero-day (CVE-2026-76461, CVSS 9.8) via SQL injection to root RCE is actively exploited in the wild, listed on CISA KEV, with urgent patching demanded and detailed IOCs/yara rule provided.

Stephen Fewer[verified]@stephenfewerActive Exploitation

The text announces three new Metasploit exploit modules for Cisco Secure Email Gateway vulnerabilities, with two CVEs confirmed on CISA KEV indicating active exploitation, and describes the vulnerability types (file write and SQLi) for the affected CVEs.

Ryx[verified]@PadhiyarRushiActive Exploitation

The tweet reports that CVE-2026-76461, a critical remote code execution vulnerability in Cisco Secure Email Gateway, is listed in CISA's Known Exploited Vulnerabilities catalog, confirming active exploitation, and notes the availability of public PoC references.

VulnTracker[verified]@vuln_trackerActive Exploitation

CVE-2026-76461 is a CVSS 9.8 SQL-injection vulnerability on Cisco Secure Email Gateway enabling unauthenticated root RCE via malicious email, confirmed in CISA KEV with no workaround but an urgent update recommendation.

情報の灯台[verified]@joho_no_todaiPatch

The text discloses a high-severity Cisco email security gateway zero-day, CVE-2026-76461, caused by SQL injection leading to unauthenticated root compromise. The primary actionable takeaway is the named patch version, AsyncOS 16.5.0-780, and the CISA-mandated federal remediation deadline.

Cytex[verified]@cytexsmbActive Exploitation

The tweet discloses a critical zero-day vulnerability (CVE-2026-76461) in Cisco Secure Email Gateway allowing unauthenticated root RCE, cites its presence on the CISA KEV catalog via the federal patch deadline, and urges immediate patching by September 17.

ボス@サイバーセキュリティの専門家[verified]@boss_sec_laboActive Exploitation

The post emphasizes active exploitation, especially for VMware vCenter CVE-2026-59310 being exploited by ransomware and references CISA KEV as evidence exploitation has begun. It also mentions Apple iOS/macOS 27 fixes and technical vulnerability details, but no PoC or named exploit tool/code is provided.