Critical severity9.8NVD Advisory· Published Mar 4, 2026· Updated Jun 17, 2026

CVE-2026-27441

Description

SEPPmail Secure Email Gateway before version 15.0.1 insufficiently neutralizes the PDF encryption password, allowing OS command execution.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Seppmail/SEPPmail
cpe:2.3:a:seppmail:seppmail:*:*:*:*:*:*:*:*
Range: <15.0.1
Seppmail/Secure Email Gatewayllm-fuzzy2 versions
<15.0.1+ 1 more
- (no CPE)range: <15.0.1
- (no CPE)range: 0

Patches

Vulnerability mechanics

References

downloads.seppmail.com/extrelnotes/150/ERN15.0.htmlnvdVendor Advisory

News mentions

SEPPMail Secure E-Mail Gateway Vulnerabilities Enable RCE and Mail Traffic Access
The Hacker News · May 19, 2026

Severity

CriticalCVSS v3.1

9.8/ 10

CVSS v49.5

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

Attack vector: Network
Complexity: Low
Privileges: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

Probability of exploitation in the next 30 days.

0.31%

VYPR risk score

Composite of severity, exploitation, and reach.

0.64high

cvss	0.637
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-78
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVE ID

CVE-2026-27441

Credits

AS
Andris Suter-Dörig
finder
KP
Kenny Paterson
coordinator
MS
Matteo Scarlata
coordinator