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VulnerabilityPublished

CVE-2026-20120: Improper Access Control

Source GCVE Database

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Authoritative record:CVE-2026-20120· Medium 5.8

Not known to be exploited · CVSS 5.8 Medium.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score
5.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 43% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
CiscoCisco Secure Firewall Adaptive Security Appliance (ASA) SoftwareAffected
  • 9.22.1.1 – 9.23.1.22
16 affected builds
Fixed in–
CiscoCisco Secure Firewall Threat Defense (FTD) SoftwareAffected
  • 7.6.0 – 7.7.11
8 affected builds
Fixed in–

AI-suggested

Until a patch is available, monitor vendor advisories for updates and consider temporary mitigations if recommended by Cisco.

Description

A logic error in the access control list (ACL) Object Group Search (OGS) implementation of Cisco Secure Firewall ASA and FTD software allows an unauthenticated remote attacker to bypass configured access controls. This vulnerability enables the attacker to send traffic that should be blocked through the firewall, potentially reaching protected network devices. The issue arises from improper population of group access control policies when OGS is configured.

References

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