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CVE-2025-61962

Good to know:

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Date: October 3, 2025

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

Severity Score

Related Resources (5)

https://nvd.nist.gov/vuln/detail/CVE-2025-61962
https://gitlab.com/fetchmail/fetchmail/-/commit/4c3cebfa4e659fb778ca2cae0ccb3f69201609a8
https://www.openwall.com/lists/oss-security/2025/10/03/2
https://www.fetchmail.info/fetchmail-SA-2025-01.txt
https://www.mend.io/vulnerability-database/CVE-2025-61962

Severity Score

Weakness Type (CWE)

Improper Neutralization of Value Delimiters

CWE-142

Top Fix

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Upgrade Version

Upgrade to version https://gitlab.com/fetchmail/fetchmail.git - 6.5.6

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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