CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 5.9. See the original NVD description below for full technical details.
CVE
CVE-2026-40684
Severity
MEDIUM
CVSS
5.9
EPSS
0.36%
Original NVD Description
In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dn_expand oddity in octal printing.
Related CVEs
Other vulnerabilities affecting the same vendor(s)