PT-2025-51144 · Exim+1 · Exim+1

Andrew Fasano · Published 2025-11-22 · Updated 2026-03-03 · CVE-2025-67896

Positive Technologies · (AI Summary)

CVSS v3.1

10

10

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.99.1

Description Exim software contains a flaw that allows for remote heap corruption. Further details about this issue will be disclosed on 2025-12-18.

Recommendations Update to version 4.99.1 or later.

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

BDU:2026-00906

CVE-2025-67896

Affected Products

Debian

Exim

References · 18

• https://exim.org/static/doc/security · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00906 · Security Note
• https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-67896 · Security Note
• https://t.me/cveNotify/145689 · Telegram Post
• https://t.me/cveNotify/145708 · Telegram Post
• https://openwall.com/lists/oss-security/2025/12/11/2 · Note
• https://twitter.com/oss_security/status/2004405773741559847 · Twitter Post
• https://twitter.com/cracbot/status/2001970822328807548 · Twitter Post
• https://t.me/cveNotify/146268 · Telegram Post
• https://t.me/tmfeed/277599 · Telegram Post
• http://openwall.com/lists/oss-security/2025/12/18/3 · Note
• https://twitter.com/melmoreira35584/status/2026399813726527729 · Twitter Post
• https://t.me/opennews/14478 · Telegram Post
• https://t.me/CVEtracker/39752 · Telegram Post