CVE-2025-67896: Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow…
CVE-2025-67896 · Severity: high · CVSS 7 · Published 2025-12-14
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.
No. Junglewise Threat Intelligence has no report of CVE-2025-67896 being exploited in the wild.
How severe is CVE-2025-67896?
High severity, with a CVSS score of 7, published 14 December 2025.
Which products and versions are affected?
Exim. The advisory does not name versions.
Is there a fix for CVE-2025-67896?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-67896?
Check whether you run Exim. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.