CVE-2026-20324Disclosure

LOWCVSS 9.9 · CRITICAL

Signal is active with 3 mentions in latest observed window

Immediate actions

Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure Firewall Management Center (FMC) Software could allow an authenticated, remote attacker to execute arbitrary commands as root. This vulnerability exists because a registered sftunnel peer has incorrect permissions to write an arbitrary file to any location on the device. An attacker could exploit this vulnerability by hijacking the sftunnel communication connection or being a valid registered sftunnel peer and sending an sftunnel command to write a malicious file to the disk of an affected device. A successful exploit could allow the attacker to write a file to the device that is executed with root privileges. To exploit this vulnerability, the attacker must have valid user credentials on the affected device.

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0.5/ 10 priority

Sources & remediation

Other references

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-sftunn-codex-c3O4Jft2

Weakness type (CWE)

CWE-862

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

Patch or workaround signal is available
12 mentions across 6 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 3 signals
Technical details provided in 9 signals
Disclosure: 8 classified signals
General: 2 classified signals
Peaked 4d ago at 5 mentions (2026-09-17); latest day: 3
12 total mentions across 6 days

Deep dive

Activity timeline12 mentions / 6d

Signal classification3 categories

Disclosure

866.7%

General

216.7%

Patch

216.7%

Referenced assets6 URLs

By indicator

Classification over time

Date	Total	Labels

2026-09-16	1	Disclosure1
2026-09-17	5	Disclosure1General2Patch2
2026-09-18	1	Disclosure1
2026-09-19	1	Disclosure1
2026-09-20	1	Disclosure1
2026-10-07	3	Disclosure3

Full discourse12 posts

Dark Web Intelligence@DailyDarkWeb45d
Patch
🔴 Cisco FMC critical root RCE Cisco disclosed CVE-2026-20324 (CVSS 9.9) in Secure Firewall Management Center — an sftunnel issue that could let an attacker write arbitrary files and execute commands as root. Exploitation path Cisco describes: controlling or hijacking a registered sftunnel peer (valid peer / credentials context required per the advisory). ⚠️ Cisco currently reports no known malicious exploitation. No workarounds available — patch via Cisco’s fixed releases. Official advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-sftunn-codex-c3O4Jft2 #ThreatIntel #CyberSecurity #Cisco #Vulnerability #RCE
Post summary
Cisco disclosed CVE-2026-20324 (CVSS 9.9 root RCE in FMC sftunnel); no known exploitation, no workarounds—remediation is patching via Cisco fixed releases.
1180851610.9K
209.0K followersView on X
ZoomEye@zoomeye_team46d
General
CVE-2026-20324 app="Cisco ASA SSL VPN" https://zoomeye.ai/searchResult?q=YXBwPSJDaXNjbyBBU0EgU1NMIFZQTiI%3D @zoomeyebot
Post summary
The post shares a ZoomEye search dork to identify internet-exposed Cisco ASA SSL VPN instances potentially related to CVE-2026-20324, functioning as asset reconnaissance rather than vulnerability disclosure, exploit sharing, or patch notification.
0602484.6K
12.7K followersView on X
zoomeyebot@zoomeyebot46d
Patch
🚨 Cisco Patches 18 Secure Firewall Flaws: Critical sftunnel and Java Deserialization Bugs Allow Root RCE (CVE-2026-20324, CVE-2026-20242) Critical Vulnerability Alert! Cisco Secure Firewall Management Center, ASA and Threat Defense is affected by CVE-2026-20324. 🔍 Identify Targets via ZoomEye: Search Dork: app="Cisco ASA SSL VPN" Exposure: 1m instances identified globally. ZoomEye Search Link: 👉 https://www.zoomeye.ai/searchResult?q=YXBwPSJDaXNjbyBBU0EgU1NMIFZQTiI%3D Cisco,SecureFirewall,CVE-2026-20324,InfoSec
Post summary
The text announces that Cisco has patched 18 Secure Firewall vulnerabilities, including critical sftunnel and Java deserialization bugs enabling root RCE (CVE-2026-20324, CVE-2026-20242), and provides ZoomEye search methods for identifying exposed instances globally. While technical details and the existence of patches are clear, no specific patch versions, advisories, or exploit details are included.
002013.5K
23 followersView on X
♫NØX♥H♪@_Why_Noot25d
Disclosure
NØX Echo Lineage Signal: CVE-2026-20324 Entity: Cisco Secure Firewall Management Center Software sftunnel Root Arbitrary Code Execution Lineage: Cisco PSIRT → Public security signal [1/5]
Post summary
The text announces and discloses CVE-2026-20324, a Root Arbitrary Code Execution vulnerability in Cisco Secure Firewall Management Center Software's sftunnel component, detailing the vulnerability type without mentioning PoC, exploit, patch, or active exploitation.
1000044
8 followersView on X
♫NØX♥H♪@_Why_Noot25d
Disclosure
Relationship: - Cisco Secure Firewall Management Center Software sftunnel Root Arbitrary Code Execution → CVE-2026-20324 → Evidence → Operational Risk Current State: DISCLOSED [2/5]
Post summary
The snippet discloses CVE-2026-20324, a root arbitrary code execution flaw in Cisco Secure Firewall Management Center's sftunnel component, marking its current state as DISCLOSED.
1000042
8 followersView on X
♫Why♥Not♪@Python_s_25d
Disclosure
NØØT Security Alerts Classification: Critical CVE: CVE-2026-20324 Product: Cisco / Cisco Secure Firewall Management Center Software sftunnel Root Arbitrary Code Execution [1/8]
Post summary
The text announces a newly disclosed critical vulnerability (CVE-2026-20324) affecting Cisco Secure Firewall Management Center Software, describing it as a root arbitrary code execution issue.
1000094
233 followersView on X
zoomeyebot@zoomeyebot43d
Disclosure
🚨 Cisco Secure Firewall sftunnel Flaw (CVE-2026-20324) Enables Root Code Execution Critical Vulnerability Alert! Cisco Secure Firewall Management Center is affected by CVE-2026-20324. 🔍 Identify Targets via ZoomEye: Search Dork: app="Cisco ASA SSL VPN" Exposure: 1m instances identified globally. ZoomEye Search Link: 👉 https://www.zoomeye.ai/searchResult?q=YXBwPSJDaXNjbyBBU0EgU1NMIFZQTiI%3D #Cisco #SecureFirewall #CVE202620324 #InfoSec
Post summary
This post discloses CVE-2026-20324 in Cisco Secure Firewall Management Center, describing a root code execution flaw and providing a ZoomEye search dork for identifying exposed targets, but does not mention active exploitation, a PoC, exploit tool, or patch.
0000074
23 followersView on X
Cybersecurity News DE@cybsecuritynews44d
Disclosure
#schwachstellen Cisco Secure Firewall Management Center: Root-Codeausführung über CVE-2026-20324 #cisco #ciscosecurefirewallmanagementcenter #cve202620324 #fmc https://cybersecurity-news.de/cisco-secure-firewall-management-center-cve-2026-20324
Post summary
The tweet announces CVE-2026-20324 affecting Cisco Secure Firewall Management Center, describing it as a root code execution vulnerability, and provides a link to a German cybersecurity news article for further details.
0000030
13 followersView on X
The CyberSec Guru@thecybersecguru44d
Disclosure
🚨 CRITICAL: Cisco FMC CVE-2026-20324 A CVSS 9.9 vulnerability in Cisco Secure Firewall Management Center’s sftunnel can allow an authenticated remote attacker to: → Write arbitrary files → Execute commands as ROOT → Compromise the FMC management plane The flaw abuses the trust relationship with registered sftunnel peers. No workaround is available. Cisco has released fixes. If you run Cisco Secure FMC, check your versions NOW. 🔗 https://thecybersecguru.com/news/cisco-fmc-cve-2026-20324-sftunnel-root-rce/ #CyberSecurity #Cisco #CVE #RCE #InfoSec #CyberAttack #NetworkSecurity
Post summary
The text announces a critical CVSS 9.9 vulnerability (CVE-2026-20324) in Cisco Secure Firewall Management Center, detailing its technical impacts and noting that official fixes have been released by the vendor.
00000111
1.6K followersView on X
cyberspace hot@hotCyberspace46d
General
CVE-2026-20324 app="Cisco ASA SSL VPN" https://zoomeye.ai/searchResult?q=YXBwPSJDaXNjbyBBU0EgU1NMIFZQTiI%3D @zoomeyebot
Post summary
The tweet references CVE-2026-20324 affecting Cisco ASA SSL VPN and includes a Zoomeye link, but offers no technical details, exploit information, or remediation guidance.
0000055
9 followersView on X
cyberspace hot@hotCyberspace46d
Disclosure
CVE-2026-20324 app="Cisco ASA SSL VPN" https://zoomeye.ai/searchResult?q=YXBwPSJDaXNjbyBBU0EgU1NMIFZQTiI%3D
Post summary
The text is a brief tweet referencing CVE-2026-20324 affecting Cisco ASA SSL VPN with a ZoomEye search link, providing minimal information beyond identification of the affected product and CVE number.
0000053
9 followersView on X
Kaitan ID Security@KaitanSecurity46d
Disclosure
🚨 CRITICAL — CVE-2026-20324 Cisco Secure Firewall Management Center Software sftunnel Root Arbitrary Code Execution Vulnerability CVSS 9.9 🔴 No patch yet Full analysis → https://sec.kaitan.id/cves/CVE-2026-20324 #Cisco #CyberSecurity #InfoSec
Post summary
The post announces a critical Cisco Secure Firewall Management Center sftunnel arbitrary code execution vulnerability with a CVSS score of 9.9 and states that no patch is yet available. It provides technical details and a link to analysis but no PoC, exploit tool, active exploitation claim, or remediation step.
0000040
90 followersView on X

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What researchers are saying

CVE-2026-20324

Dark Web Intelligence[verified]@DailyDarkWebPatch

Cisco disclosed CVE-2026-20324 (CVSS 9.9 root RCE in FMC sftunnel); no known exploitation, no workarounds—remediation is patching via Cisco fixed releases.

ZoomEye[verified]@zoomeye_teamGeneral

The post shares a ZoomEye search dork to identify internet-exposed Cisco ASA SSL VPN instances potentially related to CVE-2026-20324, functioning as asset reconnaissance rather than vulnerability disclosure, exploit sharing, or patch notification.

zoomeyebot[verified]@zoomeyebotPatch

The text announces that Cisco has patched 18 Secure Firewall vulnerabilities, including critical sftunnel and Java deserialization bugs enabling root RCE (CVE-2026-20324, CVE-2026-20242), and provides ZoomEye search methods for identifying exposed instances globally. While technical details and the existence of patches are clear, no specific patch versions, advisories, or exploit details are included.

♫Why♥Not♪[verified]@Python_s_Disclosure

The text announces a newly disclosed critical vulnerability (CVE-2026-20324) affecting Cisco Secure Firewall Management Center Software, describing it as a root arbitrary code execution issue.

zoomeyebot[verified]@zoomeyebotDisclosure

This post discloses CVE-2026-20324 in Cisco Secure Firewall Management Center, describing a root code execution flaw and providing a ZoomEye search dork for identifying exposed targets, but does not mention active exploitation, a PoC, exploit tool, or patch.

The CyberSec Guru[verified]@thecybersecguruDisclosure

The text announces a critical CVSS 9.9 vulnerability (CVE-2026-20324) in Cisco Secure Firewall Management Center, detailing its technical impacts and noting that official fixes have been released by the vendor.

Kaitan ID Security[verified]@KaitanSecurityDisclosure

The post announces a critical Cisco Secure Firewall Management Center sftunnel arbitrary code execution vulnerability with a CVSS score of 9.9 and states that no patch is yet available. It provides technical details and a link to analysis but no PoC, exploit tool, active exploitation claim, or remediation step.

♫NØX♥H♪@_Why_NootDisclosure

The text announces and discloses CVE-2026-20324, a Root Arbitrary Code Execution vulnerability in Cisco Secure Firewall Management Center Software's sftunnel component, detailing the vulnerability type without mentioning PoC, exploit, patch, or active exploitation.