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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Exim | — | Upgrade Exim to version 4.99.1 | Apr 7, 2026 | Dec 14, 2025 |
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