Gnupg2: GnuPG (version 2.5.21) for Windows contains a vulnerability where default Discretionary Access Control List
Affects gnupg2Source GCVE Database
Not known to be exploited · CVSS 9.8 Critical.
Data as of 6 Nov 2026, 05:05 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 9.8 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10gnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu Pro 20.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=esm-infra/focalOther threats | Affected
| Fixed in– |
Ubuntu Pro 18.04 LTSgnupg2pkg:deb/ubuntu/gnupg2?arch=source&distro=esm-infra/bionicOther threats | Affected
| 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.