CVE-2025-67896

7.0 HIGH

Published: December 14, 2025 Modified: December 22, 2025

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://exim.org/static/doc/security/

Source: cve@mitre.org

Vendor Advisory

https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt

Source: cve@mitre.org

Vendor Advisory

https://www.openwall.com/lists/oss-security/2025/12/11/2

Source: cve@mitre.org

Mailing List

http://www.openwall.com/lists/oss-security/2025/12/14/1

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List

http://www.openwall.com/lists/oss-security/2025/12/18/3

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List

5 reference(s) from NVD

Quick Stats

CVSS v3 Score

7.0 / 10.0

EPSS (Exploit Probability)

0.1%

23th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-122

Affected Vendors

exim

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