CyberRota Analysis
This is a low severity vulnerability with a CVSS score of 3.7. See the original NVD description below for full technical details.
CVE
CVE-2026-40686
Severity
LOW
CVSS
3.7
EPSS
0.25%
Original NVD 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.
Related CVEs
Other vulnerabilities affecting the same vendor(s)