CVE-2025-67896 HIGH

CVE-2025-67896

Vendor Exim

Product Exim

Weakness CWE-122

Published December 14, 2025

Last update December 18, 2025

View on NVD All CVEs

CVSS base score

7.0/10

Attack vector Network

Attack complexity High

Privileges required None

User interaction None

Confidentiality Low

Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

What the vulnerability does

01Description

Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.

Key dates

02Disclosure timeline

December 14, 2025 CVE published

December 18, 2025 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-67896 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/122.html