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CVE-2026-20332

Cisco Secure Adaptive Security Appliance Software, Secure Firewall Threat Defense Software and Secure Firewall Management Center Software Hardening Release - Improper Access Control Vulnerabilities

Published: Sep 16, 2026Updated: Sep 18, 2026 Sources: CVE List NVDCWE-284
9.9CRITICAL
NVD MITRE
EPSS Score
0.3%
Top 77.0%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
No Fix Available
Self-Check
Not available

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense Software and Cisco Secure Firewall Management Center Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.   The vulnerabilities tracked by CVE-2026-20332 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-284.

In plain language

AI Act now

This is a critical security flaw in Cisco firewall software with a public attack tool available; affected businesses should act urgently, although a fixed version is not yet known.

Executive summary

Improper access control vulnerabilities in Cisco Secure Adaptive Security Appliance (ASA) Software, Secure Firewall Threat Defense (FTD) Software, and Secure Firewall Management Center (FMC) Software may let a logged-in attacker bypass intended permissions and compromise connected systems.

If affected, business impact
Firewall management takeoverNetwork security controls changedSensitive data exposureService disruptionBroader network compromise

What to do now

  1. Identify whether you run Cisco Secure Adaptive Security Appliance (ASA) Software, Secure Firewall Threat Defense (FTD) Software, or Secure Firewall Management Center (FMC) Software.
  2. Ask your Cisco support contact or IT provider whether your installed release is covered by CVE-2026-20332; no fixed version has been published in the available information.
  3. Restrict management access to trusted administrators and networks until Cisco provides remediation.
  4. Review administrator accounts and recent firewall or management-setting changes for anything unexpected.
May need vendor / contractor work

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-284

Affected Products

Cisco
commercial·USaka cisco systems, cisco systems inc.
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
Networking Infrastructure
Cisco Secure Firewall Management Center (FMC)
Networking Infrastructure
Cisco Secure Firewall Threat Defense (FTD) Software
Networking Infrastructure

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Is your org exposed to CVE-2026-20332?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-asaftdfmc-uvpPROhN
sec.cloudapps.cisco.com
News mentions
2

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