CVE-2025-67896
criticalpriority · track · 39EPSS 0.005 · 40 %ileDEEURUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7–9.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (8)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2025-2840Exim: Schwachstelle ermöglicht CodeausführungDeutsch2025-12-14csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Exim ausnutzen, um eine Heap-Beschädigung zu erzielen, was möglicherweise zur Ausführung von beliebigem Code führen kann.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (12)
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2025/12/14/1cnnvd
- http://www.openwall.com/lists/oss-security/2025/12/18/3cnnvd
- https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txtcnnvd
- https://www.openwall.com/lists/oss-security/2025/12/11/2cnnvd
- https://exim.org/static/doc/security/enisa_euvd
- https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txtenisa_euvd
- https://www.openwall.com/lists/oss-security/2025/12/11/2enisa_euvd
- http://www.openwall.com/lists/oss-security/2025/12/14/1Mailing Listnvd
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