CVE-2025-67896

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CVSS 3.1

9.8 critical

EPSS

<1%p40

Published

Dec 14, 2025 (Dec 14, 2025)

Modified

Jun 17, 2026

Description

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.

Vendors: exim
Products: exim
Weakness: CWE-122
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

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