What is CVE-2025-26846?

CVE-2025-26846 is a critical-severity vulnerability in Znuny, classified under Missing Authorization. CVSS score: 9.8/10. Published 2025-05-12.

How severe is CVE-2025-26846?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Znuny

CVE-2025-26846

An issue was discovered in Znuny before 7.1.4. Permissions are not checked properly when using the Generic Interface to update ticket metadata.

Vulnerability class: Broken Access Control

Published 2025-05-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (33.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Znuny

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

www.znuny.com (Product)
www.znuny.org/en/advisories/zsa-2025-02 (Third Party Advisory)

Frequently asked questions

What is CVE-2025-26846?: CVE-2025-26846 is a critical-severity vulnerability in Znuny, classified under Missing Authorization. CVSS score: 9.8/10. Published 2025-05-12.
How severe is CVE-2025-26846?: Critical severity. CVSS v3 base score is 9.8 out of 10.