What is CVE-2025-26842?

CVE-2025-26842 is a high-severity vulnerability in Znuny, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2025-05-08.

How severe is CVE-2025-26842?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Znuny

CVE-2025-26842

An issue was discovered in Znuny through 7.1.3. If access to a ticket is not given, the content of S/MIME encrypted e-mail messages is visible to users with access to the CommunicationLog.

Vulnerability class: Broken Access Control

EPSS: 0.003 (21.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Znuny
N/a — versions n/a

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

cve@mitre.org (Vendor Advisory)

Frequently asked questions

What is CVE-2025-26842?: CVE-2025-26842 is a high-severity vulnerability in Znuny, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2025-05-08.
How severe is CVE-2025-26842?: High severity. CVSS v3 base score is 7.5 out of 10.