In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an out-of-bounds write that crashes the connection instance, or erroneous data processing that divulges data from uninitialized heap memory.
https://nvd.nist.gov/vuln/detail/CVE-2026-40687
Exim CVE-2026-40687
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Starburst-David
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- Joined: Wed Feb 11, 2026 8:31 pm