CVE-2026-114426: high-severity vulnerability in SEPPmail Secure Email Gateway (SEG)
Pre-authentication upload parsing permits resource exhaustion
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.3%
SEPPmail Secure Email Gateway before 15.1.1 processes and writes v1 file-interface upload data before authenticating the caller and without an absolute request-size limit. An unauthenticated remote attacker can occupy workers and consume temporary storage with concurrent or slow requests, causing service unavailability.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
SEPPmail AG · SEPPmail Secure Email Gateway (SEG)Related CVEs — SEPPmail Secure Email Gateway (SEG)
In the same product, most dangerous first.
CVE-2026-84832HIGHUnsafe deserialization in the REST interfaceEPSS 0.6%CVE-2026-84831HIGHMandatory MFA bypass before enrollmentEPSS 0.5%CVE-2026-114420MEDIUMLDAP wildcard injection exposes GINA recipient accountsEPSS 0.4%CVE-2026-114425CRITICALForged LFT metadata permits arbitrary file read and deletionEPSS 0.3%CVE-2026-114421HIGHEmpty initial password permits GINA account takeoverEPSS 0.3%CVE-2026-114424CRITICALCode execution through double evaluation in address replacement rulesEPSS 0.3%