CVE-2026-20332: Cisco Secure Firewall ASA/FTD/FMC access control vulnerability

CVE-2026-20332 · Severity: critical · CVSS 9.9 · Published 2026-09-16

Cisco Secure Firewall appliances (ASA, Threat Defense, and Management Center) contain multiple improper access control vulnerabilities discovered during an internal security review. These flaws allow authenticated attackers to bypass authorization checks and gain unauthorized access to firewall functionality, potentially compromising network security controls and enabling data exfiltration or lateral movement within protected networks.

Technologies: Cisco Secure Firewall ASA Software, Cisco Secure Firewall Management Center Software, Cisco Secure Firewall Threat Defense Software. Vendors: Cisco.

Quick answers

Is CVE-2026-20332 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-20332 being exploited in the wild.
How severe is CVE-2026-20332?
Critical severity, with a CVSS score of 9.9, published 16 September 2026.
Which products and versions are affected?
Cisco Secure Firewall ASA Software Multiple versions vulnerable; see fixed software section; Cisco Secure Firewall Management Center Software Multiple versions vulnerable; see fixed software section; Cisco Secure Firewall Threat Defense Software Multiple versions vulnerable; see fixed software section.
Is there a fix for CVE-2026-20332?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-20332 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-20332?
Check whether you run Cisco Secure Firewall ASA Software, Cisco Secure Firewall Management Center Software or Cisco Secure Firewall Threat Defense Software at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

CVE-2026-20332 represents a set of improper access control vulnerabilities (CWE-284) grouped under a single CVE identifier by Cisco as part of a comprehensive hardening release. The vulnerability requires authentication (PR:L per CVSS vector) and allows an attacker to gain high-impact unauthorized access with network reachability (AV:N, AC:L). An authenticated attacker can bypass authorization mechanisms to access restricted firewall functions or administrative features. Cisco has released software updates to address these issues; no workarounds are available.

Affected products

  • Cisco Secure Firewall ASA Software Multiple versions vulnerable; see fixed software section
  • Cisco Secure Firewall Threat Defense Software Multiple versions vulnerable; see fixed software section
  • Cisco Secure Firewall Management Center Software Multiple versions vulnerable; see fixed software section

Timeline

  • 2026-09-16: disclosed: Advisory published by Cisco

References

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