CVE-2026-91843Patch

MEDIUMCVSS 9.8 · CRITICAL

Exploitation observed; activity peaked at 28 mentions and remains active

Immediate actions

Patch affected systems immediately
Assume compromise if assets are exposed

Recommended action window: Immediate (within 24h)

NVD description

A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.

Back to dashboard

4.8/ 10 priority

Sources & remediation

Other references

https://support.checkpoint.com/results/sk/sk1000155

Weakness type (CWE)

CWE-121

Priority

MEDIUM

Exploitation

ACTIVE

PoC

NONE

Patch

AVAILABLE

Momentum

DECLINING

Threat summary

Active exploitation appears in 6 classified signals
Patch or workaround signal is available
68 mentions across 9 observed days
Momentum state: declining

What's happening

Active exploitation reported across 6 signals
Patch or workaround mentioned in 47 signals
Technical details provided in 66 signals
Disclosure: 19 classified signals
Peaked 6d ago at 28 mentions (2026-09-18); latest day: 1
68 total mentions across 9 days

Deep dive

Activity timeline68 mentions / 9d

Signal classification3 categories

Patch

4363.2%

Disclosure

1927.9%

Active Exploitation

68.8%

Referenced assets33 URLs

By indicator

Classification over time

Date	Total	Labels

2026-09-16	4	Patch4
2026-09-17	10	Disclosure4Patch6
2026-09-18	28	Active Exploitation2Disclosure7Patch19
2026-09-19	11	Active Exploitation1Disclosure6Patch4
2026-09-20	2	Patch2
2026-09-21	7	Disclosure1Patch6
2026-09-22	2	Active Exploitation1Patch1
2026-09-24	3	Active Exploitation2Patch1
2026-09-30	1	Disclosure1

Full discourse20 posts

The Hacker News@TheHackersNews45d
Disclosure
‼️NEW - Critical Check Point management flaw lets unauthenticated attackers run code as root. The 9.8-rated bug (CVE-2026-91843) sits in the login path before authentication. Affected versions and fix details: https://thehackernews.com/2026/09/critical-check-point-management-server.html
Post summary
The tweet announces a new critical unauthenticated RCE vulnerability (CVE-2026-91843) in Check Point management server, rated CVSS 9.8, and provides a link for affected versions and fix details.
136562165653.4K
2.4M followersView on X
elhacker.NET@elhackernet44d
Disclosure
Grave fallo de gestión en Check Point permite a atacantes no autenticados ejecutar código como root Se ha detectado una vulnerabilidad crítica (CVE-2026-91843) en los servidores de gestión y registros de Check Point https://blog.elhacker.net/2026/09/grave-fallo-de-gestion-en-check-point.html
Post summary
The text announces CVE-2026-91843, a critical unauthenticated root RCE flaw in Check Point management/logging servers, providing technical impact details but no PoC, exploit tool, patch, or active-exploitation evidence. It links to a blog post for further information.
224083124.9K
142.5K followersView on X
Ratan Jyoti@reach2ratan44d
Patch
🚨 Critical alert for SecOps & firewall admins: Check Point has dropped emergency hotfixes for CVE-2026-91843—an unauthenticated Remote Code Execution (RCE) flaw hitting Security Management and Log Servers with instant root access. What is it? A logic breakdown in the login handler lets an attacker send a crafted, unauthenticated payload directly to the management port (typically TCP 443 / Gaia Portal) and execute arbitrary commands with full root privileges. While there’s no widespread in-the-wild exploitation confirmed yet, edge security appliances are prime targets right now. How to spot an attack / Hunting IoCs: • Check /var/log/httpd2/error_log and access_log on Gaia for unusual POST requests hitting authentication endpoints (/login, /clients/) with abnormal URI lengths, null bytes, or malformed JSON/XML bodies. • Look for unexpected child processes spawned under httpd2 or web processes running shells (/bin/sh, /bin/bash, csh). • Monitor /tmp or /var/log for untrusted ELF binaries, base64-decoded scripts, or suspicious outbound connections originating from the management host. YARA Rule for Disk / Memory Triage: rule CheckPoint_CVE2026_91843_ExploitArtifact { meta: description = "Detects anomalous shell invocations and payload markers tied to Gaia web management RCE" author = "SecOps" severity = "Critical" strings: $httpd_parent = "httpd2" ascii wide $shell_exec = "/bin/sh -c" ascii wide $cmd_marker = "wget http" ascii wide $payload_sig = { 2F 62 69 6E 2F [0-4] 73 68 } condition: all of ($httpd_parent, $shell_exec) and ($cmd_marker or $payload_sig) } How to mitigate: Patch immediately: Apply Check Point’s emergency out-of-band hotfix via Central Deployment / CPUSE right now. Restrict management access: Never expose Gaia portal or management ports directly to the public internet. Restrict access strictly to trusted internal management subnets/jump boxes or via dedicated, authenticated VPN tunnels. #CyberSecurity #InfoSec #CheckPoint #ZeroDay #ThreatHunting #IncidentResponse #Vulnerability #PatchNow #SecOps #checkpoint
Post summary
The post focuses on Check Point releasing emergency hotfixes for an unauthenticated RCE CVE and provides mitigation/detection guidance, while explicitly noting that widespread in-the-wild exploitation is not yet confirmed.
1180246736
26.9K followersView on X
Dark Web Intelligence@DailyDarkWeb44d
Patch
🚨 CHECK POINT CVE-2026-91843 UNAUTHENTICATED ROOT RCE VIA LOGIN STACK OVERFLOW Check Point disclosed CVE-2026-91843: an unauthenticated remote attacker can achieve root via a stack overflow in the login process on Security Management Server, Multi-Domain Security Management, and Log Servers. Per the official SK: Affects the management / log plane — vendor says all Security Management Server deployments are vulnerable regardless of VPN configuration • Vendor reports no known in-the-wild exploitation yet • Detection signal: Audit/Admin login logs — “Administrator failed to log in: Username too long” • Fix: LivePatch (Take 29 for R82.20; Take 28 for R82.10 / R82 / R81.20); verify with `cplp list` (fwm:fwm armed, CVE-2026-91843) • Interim: restrict SmartConsole Trusted Clients ⚠️ Analyst Note: This is an official Check Point Security Knowledge advisory. Vendor currently reports no known exploitation in the wild prioritize patching/LivePatch and tighten management-plane exposure anyway. Official SK: https://support.checkpoint.com/results/sk/sk1000155 #DDW #DarkWeb #CheckPoint #CVE #RCE #CyberSecurity
Post summary
The advisory details a stack overflow RCE in Check Point management products and recommends applying LivePatch or restricting SmartConsole Trusted Clients.
1102136.6K
209.0K followersView on X
Censys@censysio46d
Patch
🚨CVE-2026-91843 is a critical (CVSS 9.8) pre-auth RCE affecting Check Point Quantum Security Management and Log Servers. Censys sees 3,836 hosts globally with the management/log server role, not a confirmed-vulnerable count. No public PoC or confirmed exploitation as of publication. Patches are available for supported versions. https://bit.ly/4y4ovQs
Post summary
The tweet reports CVE-2026-91843 as a critical pre‑auth RCE affecting Check Point Quantum Security Management and Log Servers, cites CVSS 9.8, notes patches are available, and confirms no public PoC or active exploitation.
080881.1K
12.7K followersView on X
Pierluigi Paganini - Security Affairs@securityaffairs45d
Patch
#Check #Point Fixes Critical CVE-2026-91843 Allowing Root Code Execution https://securityaffairs.com/199279/security/check-point-fixes-critical-cve-2026-91843-allowing-root-code-execution.html #securityaffairs #hacking
Post summary
The tweet announces that Check Point has released a fix for CVE-2026-91843, a critical vulnerability allowing root-level code execution, linking to a SecurityAffairs article for details.
120711.0K
37.8K followersView on X
ProtAAPP - Protege las AAPP@ProtAAPP43d
Patch
Check Point parchea CVE-2026-91843: desbordamiento en login permite RCE root sin interacción. Afecta a Management y Log Server. Mitigación temporal: restringir IPs de confianza. https://www.bleepingcomputer.com/news/security/check-point-warns-critical-flaw-lets-hackers-execute-code-as-root/ https://t.co/yhwmtRmDKj
Post summary
Check Point is addressing CVE-2026-91843, a buffer overflow in the login interface allowing remote code execution as root without interaction, affecting Management and Log Servers; a temporary mitigation of restricting trusted IPs is advised.
03060440
8.3K followersView on X
WhiskeyHacker@whiskeyhacker44d
Patch
Gee, another great Friday in cybersecurity first it was Cisco ISE yesterday now its Check Point turn : CVE-2026-91843, a management-server login overflow that can hand unauthenticated attackers root RCE perfect reason to cancel the easy morning and go patch the box that runs the rest of your security stack https://support.checkpoint.com/results/sk/sk1000155
Post summary
The post discusses Check Point CVE-2026-91843 as an unauthenticated management-server overflow leading to root RCE and urges immediate patching, supported by a vendor advisory link.
00090285
4.3K followersView on X
CERT@certlv44d
Disclosure
‼️Check Point publicējis brīdinājumu par kritisku ievainojamību CVE-2026-91843 (CVSS 9.8), kas ļauj neautentificētam uzbrucējam attālināti izpildīt patvaļīgu kodu uz iekārtas ar root lietotāja privilēģijām. Vairāk: https://cert.lv/lv/2026/09/kritiska-check-point-ievainojamiba-cve-2026-91843 https://t.co/ILmZzETgKP
Post summary
The text announces a critical Check Point vulnerability, CVE-2026-91843, with CVSS 9.8 and remote unauthenticated code execution as root. It provides vulnerability details but no PoC, exploit tooling, active exploitation evidence, or specific remediation.
04050800
5.7K followersView on X
zoomeyebot@zoomeyebot43d
Disclosure
🚨 Check Point Security Management RCE (CVE-2026-91843) Critical Vulnerability Alert! Check Point Security Management Server / Log Server is affected by CVE-2026-91843. 🔍 Identify Targets via ZoomEye: Search Dork: app="Check Point Firewall" Exposure: 277.2k instances identified globally. ZoomEye Search Link: 👉 https://www.zoomeye.ai/searchResult?q=YXBwPSJDaGVjayBQb2ludCBGaXJld2FsbCI%3D #Infosec #CyberSecurity #ZoomEye
Post summary
The text announces a critical RCE vulnerability (CVE-2026-91843) in Check Point Security Management, providing a link to search for exposed instances, but lacks details on exploits, patches, or active exploitation.
00044638
29 followersView on X
FastFoodRembrandt.onion@solminingpunk45d
Disclosure
#ALERT‼️ NEW - Critical Check Point management flaw lets unauthenticated attackers run code as root. The 9.8-rated bug (CVE-2026-91843) sits in the login path before authentication. #cybersecurity Affected versions and fix details: https://thehackernews.com/2026/09/critical-check-point-management-server.html
Post summary
The tweet announces a critical Check Point vulnerability (CVE-2026-91843) with a 9.8 CVSS score that allows unauthenticated attackers to run code as root, and provides a link to affected versions and fix details.
00050279
6.9K followersView on X
TRSiber | Siber Bilgi Ağı@trsiberyazilim41d
Patch
👉 Check Point CVE-2026-91843 güncellemesi: CISA açığın şu ana kadar istismar edilmediğini bildirdi, kritik risk LivePatch (sk1000155) ile kapatılabiliyor.
Post summary
The text announces an update for CVE-2026-91843 and reports that CISA confirmed no active exploitation, directing users to apply the LivePatch (sk1000155) as the remediation.
0004078
440 followersView on X
Rıdvan Yağlı@ridvanyagli45d
Patch
🔴 Check Point Security Management Server'larda CVE-2026-91843 - CVSS 9.8 Critical RCE açığı Kimlik doğrulama gerektirmeyen login sürecindeki stack-based buffer overflow (CWE-121), uzaktaki bir saldırganın root yetkileriyle arbitrary code execution gerçekleştirmesine neden olabiliyor. Etkilenenler: • Security Management Server • Multi-Domain Security Management Server • Log Server • Multi-Domain Log Server Smart-1 Cloud etkilenmiyor. Check Point, açığı LivePatch ile düzeltti. Olası istismar belirtisi olarak Administrator failed to log in: Username too long loglarının kontrol edilmesini öneriyor. Check Point Advisory: https://support.checkpoint.com/results/sk/sk1000155
Post summary
The tweet reports CVE‑2026‑91843, a critical RCE in Check Point Security Management Server, and notes that Check Point has released a LivePatch fix and suggests log monitoring as a mitigation.
00022382
2.5K followersView on X
sunil kumawat@Sunil_kumawat1744d
Disclosure
Unauthenticated root on Check Point Security Management and Log Servers — CVE-2026-91843, CVSS 9.8. Stack overflow in the pre-auth login path. Vendor says no known exploitation yet. The box that pushes your firewall policy is the target.
Post summary
The tweet discloses CVE-2026-91843, a stack overflow vulnerability in the pre-auth login path of Check Point Security Management and Log Servers with CVSS 9.8, providing technical details but no PoC, exploit tool, active exploitation evidence, or patch information. The vendor reports no known exploitation yet.
1002085
23 followersView on X
General Intels Daily@intels_daily44d
Disclosure
🔴 𝗖𝗥𝗜𝗧𝗜𝗖𝗔𝗟 · 𝗗𝗶𝘀𝗰𝘂𝘀𝘀𝗶𝗼𝗻 🧩 Products: 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗦𝗲𝗿𝘃𝗲𝗿, 𝗖𝗵𝗲𝗰𝗸 𝗣𝗼𝗶𝗻𝘁 𝗙𝗶𝗿𝗲𝘄𝗮𝗹𝗹 Security news report detailing a critical buffer overflow vulnerability (CVE-2026-91843) in Check Point Security Management and Log Servers allowing remote root code execution. #ThreatIntel #CTI
Post summary
The text discloses a critical buffer overflow vulnerability (CVE-2026-91843) in Check Point Security Management and Log Servers that could lead to remote root code execution, providing technical details but no further information on PoC, exploits, patches, or active exploitation.
10020282
911 followersView on X
Manuel Abreu Ortiz@IngAbreuOrtiz44d
Disclosure
Un grave fallo de gestión en Check Point permite que atacantes sin autenticación ejecuten código como root. Se ha identificado una vulnerabilidad crítica (CVE-2026-91843) en los servidores de gestión y registros de Check Point.
Post summary
The text announces a critical unauthenticated RCE vulnerability (CVE-2026-91843) in Check Point management/logging servers allowing root code execution, but provides no PoC, exploit tool, patch, or active exploitation evidence.
01020393
15.5K followersView on X
TRSiber | Siber Bilgi Ağı@trsiberyazilim42d
Disclosure
💢 Check Point yönetim sunucularında CVSS 9,8 puanlı kritik açık: CVE-2026-91843, kimlik doğrulaması olmadan root yetkisiyle kod çalıştırılmasına izin veriyor. Detaylar 👇 https://siberhaber.org/haber/check-point-cve-2026-91843-yonetim-sunucusu-kritik-acik/ #SiberGüvenlik #CheckPoint #CVE #Zafiyet #ZeroDay
Post summary
The text discloses a critical vulnerability (CVE-2026-91843) in Check Point management servers with a CVSS score of 9.8, detailing an unauthenticated remote code execution flaw, but does not claim active exploitation or mention available patches.
00020119
440 followersView on X
Cyb3rVolt3x@AndraxPentester43d
Disclosure
@SecurityWeek CVE-2026-91843 is pre-auth RCE as root through the Check Point login path on Security Management and Log Servers. The vendor says there is no in-the-wild evidence. That is not a delay: if automatic updates are off, apply the patch now. A mailbox is not the control.
Post summary
The text discloses CVE-2026-91843 as a pre-authenticated RCE vulnerability in Check Point systems, specifies its impact and affected components, and advises applying a patch while noting no active exploitation is reported.
20000105
45 followersView on X
Upwind Security MDR@UpwindMDR45d
Disclosure
🚨Critical - Check Point Quantum Security Management Unauth Login Stack Overflow RCE (CVE-2026-91843) A stack-based buffer overflow in the unauthenticated login handler of Check Point Quantum Security Management and related Security Management/Log Servers can be triggered remotely over the network with a crafted login request. Successful exploitation enables arbitrary code execution as root with no auth or user interaction. 👉Affected: Check Point Quantum Security Management and Security Management/Log Servers (versions TBD)
Post summary
The tweet announces a critical unauthenticated stack‑overflow RCE vulnerability (CVE‑2026‑91843) affecting Check Point Quantum Security Management and related log servers, enabling remote root code execution with no user interaction; no PoC, exploit tool, or patch information is provided.
00020118
321 followersView on X
The Daily Tech Feed@dailytechonx46d
Patch
Breaking: Check Point’s R81- and R82-series appliances are hit by a remote root vuln (CVE-2026-91843) that skips authentication. This high-severity buffer overflow allows root shell access via overly long usernames. Patch now via LivePatch or Takes; restrict SmartConsole Trusted Clients and audit „username too long" login failures. #Cybersecurity #Vulnerability #CheckPoint #RootAccess #CVE2026 #InfoSec https://thedailytechfeed.com/critical-check-point-vulnerability-grants-remote-root-without-login/
Post summary
The text announces CVE-2026-91843, an authentication-bypassing buffer overflow affecting Check Point R81/R82 appliances that enables remote root access, and explicitly directs users to patch via LivePatch or Takes with additional workaround steps.
00020221
795 followersView on X

Explore more

Back to dashboard

What researchers are saying

CVE-2026-91843

Ratan Jyoti[verified]@reach2ratanPatch

The post focuses on Check Point releasing emergency hotfixes for an unauthenticated RCE CVE and provides mitigation/detection guidance, while explicitly noting that widespread in-the-wild exploitation is not yet confirmed.

Dark Web Intelligence[verified]@DailyDarkWebPatch

The advisory details a stack overflow RCE in Check Point management products and recommends applying LivePatch or restricting SmartConsole Trusted Clients.

Censys[verified]@censysioPatch

The tweet reports CVE-2026-91843 as a critical pre‑auth RCE affecting Check Point Quantum Security Management and Log Servers, cites CVSS 9.8, notes patches are available, and confirms no public PoC or active exploitation.

WhiskeyHacker[verified]@whiskeyhackerPatch

The post discusses Check Point CVE-2026-91843 as an unauthenticated management-server overflow leading to root RCE and urges immediate patching, supported by a vendor advisory link.

zoomeyebot[verified]@zoomeyebotDisclosure

The text announces a critical RCE vulnerability (CVE-2026-91843) in Check Point Security Management, providing a link to search for exposed instances, but lacks details on exploits, patches, or active exploitation.

TRSiber | Siber Bilgi Ağı[verified]@trsiberyazilimPatch

The text announces an update for CVE-2026-91843 and reports that CISA confirmed no active exploitation, directing users to apply the LivePatch (sk1000155) as the remediation.

Rıdvan Yağlı[verified]@ridvanyagliPatch

The tweet reports CVE‑2026‑91843, a critical RCE in Check Point Security Management Server, and notes that Check Point has released a LivePatch fix and suggests log monitoring as a mitigation.

General Intels Daily[verified]@intels_dailyDisclosure

The text discloses a critical buffer overflow vulnerability (CVE-2026-91843) in Check Point Security Management and Log Servers that could lead to remote root code execution, providing technical details but no further information on PoC, exploits, patches, or active exploitation.