Medium 5.9Published Oct 3, 2025

CVE-2025-61962In fetchmail before 6.5.6, the SMTP client can crash when authenticating upon receiving a 334 status code in a malformed context.

Updated under an hour ago (Oct 28, 2026, 10:40 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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

CVSS: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-142
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Deferred
Record last updated: Nov 4, 2025
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

fetchmail fetchmail fetchmail:fetchmail (from the name)	from 5.9.9 before 6.5.6	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.