Vulnerability DatabaseCVE-2025-67896
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CVE-2025-67896
Published:December 14, 2025
Updated:June 07, 2026
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.
Affected Packages
https://github.com/Exim/exim.git (GITHUB):
Affected version(s) =exim-4.99 <exim-4.99.1
Fix Suggestion:
Update to version exim-4.99.1
Related Resources (5)
https://www.openwall.com/lists/oss-security/2025/12/11/2
http://www.openwall.com/lists/oss-security/2025/12/14/1
http://www.openwall.com/lists/oss-security/2025/12/18/3
https://exim.org/static/doc/security/
https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt
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CVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
HIGH
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
LOW
Weakness Type (CWE)
Heap-based Buffer Overflow
CWE-122
EPSS
Base Score:
0.07