CVE-2025-61962

MEDIUM

Published Oct 4, 2025 Modified Apr 15, 2026 CWE-142

Description

In fetchmail before 6.5.6, the SMTP client can crash when authenticating upon receiving a 334 status code in a malformed context.

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CVSS v3.1 Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-142 CWE-142

References

Other References

https://gitlab.com/fetchmail/fetchmail/-/commit/4c3cebfa4e659fb778ca2cae0ccb3f69201609a8 https://www.fetchmail.info/fetchmail-SA-2025-01.txt https://www.openwall.com/lists/oss-security/2025/10/03/2 http://www.openwall.com/lists/oss-security/2025/10/04/3

Frequently Asked Questions

What is CVE-2025-61962? +

In fetchmail before 6.5.6, the SMTP client can crash when authenticating upon receiving a 334 status code in a malformed context. It has a CVSS v3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2025-61962? +

CVE-2025-61962 has a CVSS v3.1 score of 5.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-61962? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.