CVE-2026-29136 identifies an HTML injection vulnerability (CWE-79) in SEPPmail Secure Email Gateway versions prior to 15.0.3, enabling an attacker to embed malicious HTML within notification emails concerning new CA certificates. This vulnerability carries a CVSS v4.0 score of 5.3 (Medium), indicating a network attack vector with low complexity, but requires user interaction to view the compromised email, potentially leading to client-side issues or phishing. There is currently no evidence of active exploitation, and no public exploit code is available on platforms like Metasploit or ExploitDB. Community discussion is minimal with only one mention, and its EPSS score of 0.00027 suggests a very low probability of exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 15.0.3CPE matchmatch criteria | cpe:2.3:a:seppmail:secure_email_gateway:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/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
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.