Is there a public exploit for CVE-2026-114426?

No public exploit for CVE-2026-114426 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-114426?

CVE-2026-114426 scores CVSS 8.7 (v4.0), rated high.

What does CVE-2026-114426 affect?

CVE-2026-114426 affects SEPPmail AG SEPPmail Secure Email Gateway (SEG).

8.7 High

SEPPmail Secure Email Gateway before 15.1.1 processes and writes v1 file-interface upload data before authenticating the caller and without…

CVE-2026-114426

SEPPmail Secure Email Gateway before 15.1.1 processes and writes v1 file-interface upload data before authenticating the caller and without an absolute request-size limit. An unauthenticated remote attacker can occupy workers and consume temporary storage with concurrent or slow requests, causing service unavailability.

Assessment

CVSS: 8.7 (v4.0)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 4 November 2026
Last updated: 4 November 2026
Affected: SEPPmail AG · SEPPmail Secure Email Gateway (SEG)
Assigner: NCSC.ch

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

At the source

EUVD (ENISA)

References

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