CVE-2025-53391

The Debian zuluPolkit/CMakeLists.txt file for zuluCrypt through the zulucrypt_6.2.0-1 package has...

9.3 CriticalFix available

The Debian zuluPolkit/CMakeLists.txt file for zuluCrypt through the zulucrypt_6.2.0-1 package has insecure PolicyKit allow_any/allow_inactive/allow_active settings that allow a local user to escalate their privileges to root.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.17%Up 0.2 points since Jun 29, 2025

What each source reports

CVE List Score used 9.3

Record: CVE-2025-53391
CVSS 3.1: 9.3 CriticalCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-863
Updated: 2026-11-02

EUVDEUVD-2025-19461 9.3

Record: EUVD-2025-19461
CVSS 3.1: 9.3 CriticalCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-33qm-768m-wx8p 9.3

The Debian zuluPolkit/CMakeLists.txt file for zuluCrypt through the zulucrypt_6.2.0-1 package has...

Record: GHSA-33qm-768m-wx8p
CVSS 3.1: 9.3 CriticalCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-863
Updated: 2026-11-02

NVD 9.3

Record: CVE-2025-53391
CVSS 3.1: 9.3 CriticalCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-863
Updated: 2026-11-02

OSVDEBIAN-CVE-2025-53391 9.3

Record: DEBIAN-CVE-2025-53391
CVSS 3.1: 9.3 CriticalCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-53391 9.3

Record: UBUNTU-CVE-2025-53391
CVSS 3.1: 9.3 CriticalCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

OSV No score

Record: CVE-2025-53391
Updated: 2026-11-02

OSVUSN-8218-1 No score

zulucrypt vulnerability

Aaron Rainbolt discovered that zuluCrypt used insecure PolicyKit settings in zuluPolkit. An attacker could possibly use this issue to cause local privilege escalation to root. (CVE-2025-53391)

Record: USN-8218-1
Updated: 2026-11-02

Affected products

debian zulucrypt

Affected packages

Affected packages
Package	Affected	Fixed
`zulucrypt` Debian:11	All versions, plus listed versions 5.7.1-26.2.0-1	None known
`zulucrypt` Ubuntu:Pro:18.04:LTS	before 5.4.0-2ubuntu0.1~esm2, plus listed versions 5.2.0-15.2.0-35.4.0-25.4.0-2build15.4.0-2ubuntu0.1~esm1	5.4.0-2ubuntu0.1~esm2
`zulucrypt` Ubuntu:Pro:20.04:LTS	before 5.7.0-1ubuntu0.1~esm1, plus listed versions 5.5.0-15.6.0-15.6.0-25.7.0-15.7.0-1build1	5.7.0-1ubuntu0.1~esm1
`zulucrypt` Ubuntu:Pro:22.04:LTS	before 5.7.1-2ubuntu0.1~esm1, plus listed versions 5.7.1-2	5.7.1-2ubuntu0.1~esm1
`zulucrypt` Ubuntu:Pro:24.04:LTS	before 6.2.0-1ubuntu3+esm1, plus listed versions 6.2.0-1ubuntu16.2.0-1ubuntu26.2.0-1ubuntu3	6.2.0-1ubuntu3+esm1
`zulucrypt` Ubuntu:25.10	All versions, plus listed versions 6.2.0-1ubuntu3	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-53391 is a critical vulnerability (CVSS 9.3) in Debian Zulucrypt, published June 28, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 6th percentile. Fixed in zulucrypt 5.4.0-2ubuntu0.1~esm2.

References

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