CVE Catalog

CVE-2026-76420

CriticalCVSS 9.0
Published: Translated: NVD NIST

Summary

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. The issue is due to incorrect initialization of encryption parameters for the AJP connector at boot time. A successful exploit could allow the attacker to execute commands as root and gain full control over the FMC REST APIs, but only if the sftunnel connection between FMC and FTD is down.

Risk Assessment

An attacker could gain root privileges and take control of the FMC REST APIs, potentially leading to full compromise of network security management. However, exploitation requires the sftunnel connection between FMC and FTD to be down.

Recommendation

Apply the available Cisco security updates for Cisco Secure FMC. Additionally, monitor the sftunnel connection status and restrict network access to the AJP connector.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS