Uncontrolled Memory Allocation in Cisco Secure Firewall Threat Defense (FTD) and Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC) - CVE-2026-20295
Published: September 17, 2026
Vulnerability identifier: #VU150676
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20295
CWE-ID: CWE-789
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of memory resources during sftunnel TLS connection setup. A remote attacker can cause a denial of service (DoS) condition on the target system.
Affected software
Cisco Secure Firewall Threat Defense (FTD)
Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC)
Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC)
How to mitigate CVE-2026-20295
Install updates from vendor's website.
Cisco Secure Firewall Threat Defense (FTD) - addressed in versions 7.0.10, 7.2.12, 7.4.7, 7.6.6, 7.7.13
Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC) - addressed in versions 7.0.10, 7.2.12, 7.4.7, 7.6.6, 7.7.13
Cisco Secure Firewall Management Center (formerly Firepower Management Center, FMC) - addressed in versions 7.0.10, 7.2.12, 7.4.7, 7.6.6, 7.7.13