CVE-2026-40687
4.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Exim | Exim | 0 < 4.99.2 | affected |
Weaknesses
- CWE-909: CWE-909 Missing Initialization of Resource
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://www.openwall.com/lists/oss-security/2026/04/30/21
- https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40687.assessment
- https://code.exim.org/exim/exim/commit/68b963b9f75ca27b38e1c0f8c87037990199f505
- https://exim.org/static/doc/security/CVE-2026-40687.txt
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