CVE-2026-94184
mediumA stack-based buffer overflow flaw was found in fetchmail when built with NTLM support.
A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response. This may lead to remote code execution depending on stack-frame layout, or to authentication failure or process termination under memory hardening.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/errata/RHSA-2026:85959 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:86981 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:86982 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-94184 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2531984 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2537395 secalert@redhat.com
- https://gitlab.com/fetchmail/fetchmail/-/commit/cb5be5c38471eec19e519ace0bc569176317ea92 secalert@redhat.com
- https://www.fetchmail.info/fetchmail-SA-2026-01.txt secalert@redhat.com
- https://www.openwall.com/lists/oss-security/2026/06/27/8 secalert@redhat.com
- http://www.openwall.com/lists/oss-security/2026/09/23/1 af854a3a-2127-422b-91ae-364da2661108