VULNERABILITY INTELLIGENCE

CVE-2026-40686

CVSS score3.7 LOW
EPSS probability0.25%
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:N

Description

In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing characters are present (malformed UTF-8 header data). Information might be divulged within an error message produced during handling of an unrelated e-mail message.

Weakness classification

  • CWE-125: Out-of-bounds Read

Primary references