Vulnerability in Fetchmail

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.

EPSS: 0.004 (31.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Fetchmail — versions 5.9.9

Weakness classification (CWE)

CWE-142

References

Frequently asked questions

What is CVE-2025-61962?: CVE-2025-61962 is a medium-severity vulnerability in Fetchmail, classified under CWE-142. CVSS score: 5.9/10. Published 2025-10-04.
How severe is CVE-2025-61962?: Medium severity. CVSS v3 base score is 5.9 out of 10.