CVE-2026-76420

9 CRITICAL

Published 2026-09-16 · Updated 2026-09-17

AI risk analysis

Summary: The flaw allows unauthenticated attackers to exploit incorrect encryption parameter initialization, gaining root access and control over FMC REST APIs.
Exploitability: Exploitation requires a down valid sftunnel connection, making it moderately difficult.
Blast radius: If exploited, attackers could gain full control over the FMC REST APIs, impacting device security significantly.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Disable the AJP connector or upgrade to the latest version of Cisco Secure FMC Software.

rceauth-bypasswebapicritical

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

A vulnerability in the internal configuration of the Apache JServ Protocol (AJP) connector for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to impersonate a peer device. This vulnerability is due to incorrect initialization of encryption parameters for the AJP connector at boot time. An attacker could exploit this vulnerability by sending crafted packets to the AJP connector. A successful exploit could allow the attacker to execute commands as root and gain full control over the FMC REST APIs on the affected device. Note: This vulnerability can be exploited only if the valid sftunnel connection between Cisco Secure FMC Software and Cisco Secure FTD Software is down.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-285

All references

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc2-multivulns-HXgcqRG

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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