What is CVE-2025-53391?

CVE-2025-53391 is a critical-severity vulnerability in Debian Zulucrypt, classified under Incorrect Authorization. CVSS score: 9.3/10. Published 2025-06-28.

How severe is CVE-2025-53391?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Is CVE-2025-53391 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Debian Zulucrypt

CVE-2025-53391

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.

Vulnerability class: Broken Access Control

EPSS: 0.001 (4.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Debian Zulucrypt — versions zulucrypt_5.5.0-1

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

Frequently asked questions

What is CVE-2025-53391?: CVE-2025-53391 is a critical-severity vulnerability in Debian Zulucrypt, classified under Incorrect Authorization. CVSS score: 9.3/10. Published 2025-06-28.
How severe is CVE-2025-53391?: Critical severity. CVSS v3 base score is 9.3 out of 10.
Is CVE-2025-53391 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.