What’s Vulnerable › Vulnerabilities

CVE-2025-61962

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-04 · updated 2026-10-19
• Weakness: 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.

Affected products

• fetchmail: from 5.9.9 before 6.5.6 — fixed in 6.5.6

How to fix

Upgrade to a fixed version: fetchmail 6.5.6. Check the vendor advisory for mitigations.

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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