CVE-2026-84832: CWE-502 Deserialization of untrusted data in SEPPmail AG SEPPmail Secure Email Gateway (SEG)
SEPPmail Secure Email Gateway before 15.0.6 deserializes attacker-controlled data in a privileged REST import workflow without adequate validation. An attacker with a privileged API token can execute arbitrary commands with "nobody" privileges.
CVE-2026-84832: CWE-502 Deserialization of untrusted data in SEPPmail AG SEPPmail Secure Email Gateway (SEG)
Description
SEPPmail Secure Email Gateway before 15.0.6 deserializes attacker-controlled data in a privileged REST import workflow without adequate validation. An attacker with a privileged API token can execute arbitrary commands with "nobody" privileges.
CVSS v4.0
Score 8.6high
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- NCSC.ch
- Date Reserved
- 2026-09-02T11:31:39.643Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9935a4acd9273b49b205a5
Added to database: 09/03/2026, 08:53:56 UTC
Last updated: 09/03/2026, 22:52:15 UTC
Views: 14
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.