CVE-2025-67896

CRITICAL EPSS 32.2%
Published Dec 14, 20256mo ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Dec 14, 2025 6mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
32.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-122

Affected Products 1

VendorProductVersionRange
eximexim* <4.99.1

References 5

  • openwall.com http://www.openwall.com/lists/oss-security/2025/12/14/1
    Mailing List
  • openwall.com http://www.openwall.com/lists/oss-security/2025/12/18/3
    Mailing List
  • exim.org https://exim.org/static/doc/security/
    Vendor Advisory
  • exim.org https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt
    Vendor Advisory
  • openwall.com https://www.openwall.com/lists/oss-security/2025/12/11/2
    Mailing List

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.