Cisco Secure Firewall Adaptive Security Appliance, Secure Firewall Threat Defense, and Secure Firewall Management Center Software Hardening Release: September 2026

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Secure Firewall Threat Defense (FTD) Software and Cisco Secure Firewall Management Center (FMC) Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. These vulnerabilities were found during internal testing. Two of them are known to be actively exploited. For more information, see the following advisories: Cisco Secure Firewall Management Center Software Static Credential Vulnerability and Cisco Secure Firewall Management Center Software Authentication Bypass Vulnerability . To assist customers in patching and to streamline the disclosure process, Cisco has grouped these issues by their underlying vulnerability class — Common Weakness Enumeration (CWE) — and assigned a single Common Vulnerabilities and Exposures Identifier (CVE ID) to each CWE grouping. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-asaftdfmc-uvpPROhN This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of September 16, 2026, Security Advisories . Security Impact Rating: Critical CVE: CVE-2026-20329,CVE-2026-20330,CVE-2026-20331,CVE-2026-20332,CVE-2026-20333,CVE-2026-20334,CVE-2026-20335,CVE-2026-20336

What to do

Install the fixed versions listed in the official advisory. If you cannot update right away, apply the workarounds or mitigations it describes and limit access to the affected service.

Details

Vendor

Cisco

Product

Cisco ASA / FTD / FMC

CVE

CVE-2026-20329, CVE-2026-20330, CVE-2026-20331, CVE-2026-20332, CVE-2026-20333, CVE-2026-20334, CVE-2026-20335, CVE-2026-20336

Affected versions

Cisco Secure Firewall Adaptive Security Appliance (ASA) Soft 9.16: 37 versions, from 9.16.1 to 9.16.4.92
Cisco Secure Firewall Adaptive Security Appliance (ASA) Soft 9.18: 31 versions, from 9.18.1.3 to 9.18.4.135
Cisco Secure Firewall Adaptive Security Appliance (ASA) Soft 9.20: 24 versions, from 9.20.1 to 9.20.4.235
Cisco Secure Firewall Adaptive Security Appliance (ASA) Soft 9.23: 9 versions, from 9.23.1 to 9.23.1.195
Cisco Secure Firewall Adaptive Security Appliance (ASA) Soft 9.22: 13 versions, from 9.22.1.1 to 9.22.3.5
Cisco Secure Firewall Adaptive Security Appliance (ASA) Soft 9.19: 9.19.1.42
Cisco Secure Firewall Adaptive Security Appliance (ASA) Soft 9.24: 6 versions, from 9.24.1 to 9.24.10
Cisco Secure Firewall Management Center (FMC) 7.0: 17 versions, from 7.0.0 to 7.0.9
Cisco Secure Firewall Management Center (FMC) 7.2: 20 versions, from 7.2.0 to 7.2.11
Cisco Secure Firewall Management Center (FMC) 7.3: 4 versions, from 7.3.0 to 7.3.1.2
Cisco Secure Firewall Management Center (FMC) 7.4: 13 versions, from 7.4.0 to 7.4.7
Cisco Secure Firewall Management Center (FMC) 7.6: 7 versions, from 7.6.0 to 7.6.5
Cisco Secure Firewall Management Center (FMC) 7.7: 5 versions, from 7.7.0 to 7.7.12
Cisco Secure Firewall Management Center (FMC) 10.0: 10.0.0; 10.0.1
Cisco Secure Firewall Threat Defense (FTD) Software 7.0: 16 versions, from 7.0.0.1 to 7.0.9
Cisco Secure Firewall Threat Defense (FTD) Software 7.3: 4 versions, from 7.3.0 to 7.3.1.2
Cisco Secure Firewall Threat Defense (FTD) Software 7.4: 11 versions, from 7.4.0 to 7.4.7
Cisco Secure Firewall Threat Defense (FTD) Software 7.6: 5 versions, from 7.6.0 to 7.6.4
Cisco Secure Firewall Threat Defense (FTD) Software 7.7: 4 versions, from 7.7.0 to 7.7.11
Cisco Secure Firewall Threat Defense (FTD) Software 10.0: 10.0.0 (from the advisory and NVD; check the exact builds in the official advisory)

CVSS score

9.9

Actively exploited

Not known at this time

Source

Cisco PSIRT – original advisory

Published

September 18, 2026

The description and the recommended action are quoted from the public advisory (the action is our generic advice); severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.