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.

CVSS 3.1

5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 34% of CVEs (scores of 2026-10-25)

CWE

CWE-142

Published

2025-10-04

Modified

2026-10-19

Record from

the NVD, synced 2026-10-19

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

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