Vulnerability · Published Jul 17, 2026 · Assigned by NCSC.ch
CVE-2026-9592Sensitive Information Disclosure in HTTP header
High 7.5
In plain English
A high-severity security flaw in SEPPmail Secure Email Gateway & SEPPmail Cloud from SEPPmail. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Severity (CVSS 4.0)7.5High
Exploit odds (30 days)0.2%top 84.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
SEPPmail Secure Email Gateway & SEPPmail Cloud before version 15.0.4.2 allows an attacker to replay & hijack a user session in the GINA web portal, as the session token is disclosed inside the URL and a HTTP header.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SEPPmail | SEPPmail Secure Email Gateway & SEPPmail Cloud | see references |
Weakness: CWE-598 · Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U