CVE-2026-44128

CriticalRCE

Published: 08 May 2026

Published

08 May 2026

Modified

18 May 2026

KEV Added

—

Patch

—

CVSS Score v4 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Score 0.0085 53.5th percentile

Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-44128 is a critical-severity Eval Injection (CWE-95) vulnerability in Seppmail (inferred from references). Its CVSS base score is 9.3 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 46.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-28588

Vulnerability details

SEPPmail Secure Email Gateway before version 15.0.2.1 allows unauthenticated remote code execution in the new GINA UI because an endpoint passes attacker-controlled input from a parameter to Perl's eval.

CWE(s): CWE-95

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Unauthenticated RCE via eval injection on public-facing SEPPmail gateway directly matches exploitation of internet-exposed application for initial access/execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0