Vulnerability · Published Nov 4, 2026 · Assigned by NCSC.ch
CVE-2026-114424Code execution through double evaluation in address replacement rules
Critical 9.2
In plain English
A critical-severity security flaw in SEPPmail Secure Email Gateway (SEG) from SEPPmail AG. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Official description
SEPPmail Secure Email Gateway before 15.1.1 can evaluate attacker-influenced replacement text as Perl code in sender or recipient replacement rules. An unauthenticated remote sender can execute operating-system commands in the mail-processing worker context when an active rule uses message-derived replacement data and its search condition matches. The validated worker context was root.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SEPPmail AG | SEPPmail Secure Email Gateway (SEG) | 0 – before 15.1.1 |
Weakness: CWE-95 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N