CVE-2026-40686
LOW
NVD
CVSS Score
3.7
Severity
LOW
Published
Apr 30, 2026
Vendor
unknown
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.