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    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.

    Published:Oct 4, 2025
    Last Modified:Apr 15, 2026
    EPS:Oct 4, 2025
    EPSS Score:0.00056
    CVSS Score:5.9

    Affected Products

    Vendor
    Fetchmail
    Product
    Fetchmail

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2021-39272 (CVSS 5.9) — Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a certain …
    CVE-2021-36386 (CVSS 7.5) — report_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf va_list a…
    CVE-2012-3482 (CVSS 5.8) — Fetchmail 5.0.8 through 6.3.21, when using NTLM authentication in debug mode, allows remote NTLM servers to (1…
    CVE-2011-1947 (CVSS 5) — fetchmail 5.9.9 through 6.3.19 does not properly limit the wait time after issuing a (1) STARTTLS or (2) STLS …
    CVE-2010-1167 (CVSS 4.3) — fetchmail 4.6.3 through 6.3.16, when debug mode is enabled, does not properly handle invalid characters in a m…
    CVE-2010-0562 (CVSS 6.8) — The sdump function in sdump.c in fetchmail 6.3.11, 6.3.12, and 6.3.13, when running in verbose mode on platfor…
    CVE-2009-2666 (CVSS 6.4) — socket.c in fetchmail before 6.3.11 does not properly handle a '\0' character in a domain name in the subject'…
    CVE-2008-2711 (CVSS 4.3) — fetchmail 6.3.8 and earlier, when running in -v -v (aka verbose) mode, allows remote attackers to cause a deni…
    CVE-2007-4565 (CVSS 5) — sink.c in fetchmail before 6.3.9 allows context-dependent attackers to cause a denial of service (NULL derefer…
    CVE-2006-5867 (CVSS 7.8) — fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured l…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High