# CVE-2026-118131: CVE-2026-118131

Status: published. Published: 2026-10-27. Updated: 2026-11-04.

GnuPG (version 2.5.21) for Windows contains a vulnerability where default Discretionary Access Control List (DACL) inheritance on the C:\ProgramData directory allows members of the BUILTIN\Users group to create arbitrary subdirectories under this path. An attacker with low-privilege access can create the expected GnuPG configuration directory and inject malicious configuration files consumed by GnuPG components. This can result in code execution within the security context of the victim user.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- GnuPG / GnuPG: 2.5.21 (affected). Source: CNA: certcc

## Severity and prioritization

- CVSS 3.1: 9.8 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: ADP: CISA-ADP

- CISA KEV: No listing in collected sources

- EPSS: 0.19% as of 2026-11-04; percentile 8.38%

- SSVC: exploitation none; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-732, CWE-379, CWE-427

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://atos.net/en/lp/cybershield/a-tale-of-several-hijacks-and-what-it-taught-me-about-runtime-driven-testing (CNA: certcc)

## Provenance

- CNA: certcc: https://www.cve.org/CVERecord?id=CVE-2026-118131; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-118131; retrieved 2026-11-04; source updated Not reported

Revision: fc58f0ce10e8ef1257017ff3b1eafa465c0a5743e62e1a8f8a6a9a7c90239f34

Canonical: https://y2.dev/cve/CVE-2026-118131

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