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CVE-2026-118131VulnerabilityPublished Updated

Gnupg2: GnuPG (version 2.5.21) for Windows contains a vulnerability where default Discretionary Access Control List

Affects gnupg2Source GCVE Database

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Authoritative record:CVE-2026-118131· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical.

Data as of 6 Nov 2026, 05:05 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.19.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Oct 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 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10gnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=stonkingOther threatsAffected
  • 2.4.8-4ubuntu3 – 2.4.9-4ubuntu3
4 affected builds
Fixed in–
Ubuntu 26.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=resoluteOther threatsAffected
  • 2.4.8-2ubuntu2 – 2.4.8-4ubuntu3.1
5 affected builds
Fixed in–
Ubuntu 24.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=nobleOther threatsAffected
  • 2.2.40-1.1ubuntu1 – 2.4.4-2ubuntu17.6
9 affected builds
Fixed in–
Ubuntu 22.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=jammyOther threatsAffected
  • 2.2.20-1ubuntu4 – 2.2.27-3ubuntu2.5
8 affected builds
Fixed in–
Ubuntu Pro 20.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=esm-infra/focalOther threatsAffected
  • 2.2.12-1ubuntu3 – 2.2.19-3ubuntu2.5+esm1
8 affected builds
Fixed in–
Ubuntu Pro 18.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=esm-infra/bionicOther threatsAffected
  • 2.1.15-1ubuntu8 – 2.2.4-1ubuntu1.6+esm2
10 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, restrict write permissions to the C:\ProgramData directory to prevent unauthorized creation of subdirectories by low-privilege users. Monitor official GnuPG and Ubuntu security advisories for updates and apply patches promptly once released.

Description

GnuPG version 2.5.21 for Windows has a vulnerability due to default Discretionary Access Control List (DACL) inheritance on the C:\ProgramData directory. This allows low-privilege users to create arbitrary subdirectories and inject malicious configuration files into the GnuPG configuration directory. Exploitation can lead to code execution within the victim user's security context. The vulnerability has a critical severity with a CVSS score of 9.8.

References

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