PatchTheCVECVE-2026-29144: SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forg
CVE-2026-29144 is a medium-severity flaw (CVSS 5.3) affecting secure email gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge security tags using Unicode lookalike characters.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 89%) |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2026-04-02 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-29144?
secure email gateway: upgrade to 15.0.3. Exact commands for each OS are on this page.
Is CVE-2026-29144 being exploited?
CVE-2026-29144 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-29144 affect?
CVE-2026-29144 affects secure email gateway. Severity is medium (CVSS 5.3). SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge security tags using Unicode lookalike characters.
How urgent is CVE-2026-29144?
Priority 26/100. Remotely exploitable, no login, no user action
Related CVEs
- CVE-2026-29139 CRITICAL 9.8 UPGRADE SEPPmail Secure Email Gateway before version 15.0.3 allows account takeover by abusing GINA account initializa
- CVE-2026-29143 CRITICAL 9.1 UPGRADE SEPPmail Secure Email Gateway before version 15.0.3 does not properly authenticate the inner message of S/MIME
- CVE-2026-29133 CRITICAL 9.1 UPGRADE SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to upload PGP keys with UIDs that do no
- CVE-2026-29131 HIGH 7.5 UPGRADE SEPPmail Secure Email Gateway before version 15.0.3 allows attackers with a specially crafted email address to
- CVE-2026-29132 HIGH 7.5 UPGRADE SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker with access to a victim's GINA account