Is CVE-2026-44129 in the CISA KEV catalog?

No. CVE-2026-44129 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-44129?

CVE-2026-44129 has a CVSS v4 base score of 8.3 (HIGH).

What is the EPSS score for CVE-2026-44129?

CVE-2026-44129 has an EPSS score of 0.53% (42th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-44129?

No published fix for CVE-2026-44129 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-44129

HIGH

8.3

CVSS v4

NVD

Description

SEPPmail Secure Email Gateway before version 15.0.4 contains a server-side template injection vulnerability in the new GINA UI because an endpoint accepts attacker-controlled template, allowing remote attackers to execute arbitrary template expressions and potentially achieve remote code execution depending on the enabled template plugins.

CWE-1336

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v4 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Impact

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/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

Exploit Intelligence

0.53%probability of exploitation in 30 days

42ndpercentile

Moderate risk: more likely to be exploited than 42% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-1336 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-4040	Critical	9.8	100%	KEV	Fix
CVE-2024-23692	Critical	9.8	99%	KEV	-
CVE-2025-47916	Critical	10.0	85%	-	Fix
CVE-2024-32651	Critical	10.0	84%	-	-
CVE-2022-25813	High	7.5	67%	-	Fix
CVE-2025-34300	Unscored	-	49%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.