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Critical 9.8Published Dec 14, 2025
CVE-2025-67896Exim 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.
Updated under an hour ago ()
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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
- 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-122
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
exim exim exim:exim | before 4.99.1 | NVD |
References
- https://exim.org/static/doc/security/vendor-advisory
- https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txtvendor-advisory
- https://www.openwall.com/lists/oss-security/2025/12/11/2mailing-list
- http://www.openwall.com/lists/oss-security/2025/12/14/1mailing-list
- http://www.openwall.com/lists/oss-security/2025/12/18/3mailing-list
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.