CVE-2026-76420 Cisco Secure FMC Software - Command Injection

Cisco Secure FMC Software contains a command injection caused by incorrect initialization of encryption parameters in the Apache JServ Protocol (AJP) connector, letting unauthenticated remote attackers execute commands as root, exploit requires sftunnel connection to Cisco Secure FTD Software to be down.

CVSS base score 9.0 /10
Critical
CISA KEV
Not listed
Public exploit
None known
EPSS
0.38% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-285

Vendor fix

Update to the latest version of Cisco Secure FMC Software.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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