VulnSocial

CVE-2026-29140Disclosure(seppmail / secure_email_gateway)

LOWCVSS 5.3 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to cause attacker-controlled certificates to be used for future encryption to a victim by adding the certificates to S/MIME signatures.

seppmail CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-295

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • secure_email_gateway

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
seppmail
Products
secure_email_gateway

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-04-02: 1Technical Details · 2026-04-02: 104-02
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • CVE@CVEnew
    Disclosure

    CVE-2026-29140 SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to cause attacker-controlled certificates to be used for future encryption to a victim by addin… https://www.cve.org/CVERecord?id=CVE-2026-29140

    Post summary

    The post announces CVE-2026-29140, noting that SEPPmail Secure Email Gateway versions before 15.0.3 allow attacker‑controlled certificates to be used for future encryption, without any mention of patches, exploits, or PoC.

    00000133
    56.9K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appseppmailsecure_email_gateway---

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