VULNERABILITY INTELLIGENCE

CVE-2026-40687

CVSS score4.8 MEDIUM
EPSS probability0.37%
CISA KEVNot currently listed
Published2026-04-30
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

Description

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.

Weakness classification

  • cve@mitre.org: CWE-909

Primary references