CVE-2025-67896

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-67896
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-14 04:15:50 UTC
Updated2026-10-14 13:10:00 UTC
DescriptionExim 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

Problem Types: CWE-122 | CWE-122 CWE-122 Heap-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
3.1CNACVSS7HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Exim Exim All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Exim Exim affected 4.99 4.99.1 custom Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2025/12/14/1 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List
exim.org/static/doc/security [email protected] exim.org Vendor Advisory
www.openwall.com/lists/oss-security/2025/12/18/3 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List
www.openwall.com/lists/oss-security/2025/12/11/2 [email protected] www.openwall.com Mailing List
exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt [email protected] exim.org Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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