High severity · published Sep 3, 2026
CVE-2026-84832
Unsafe deserialization in the REST interface
8.6
CVSS
0.6%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SS
SEPPmail Secure Email Gateway (SEG) · SEPPmail AG
before 15.0.6 · source: vendor
Affected product
SS
SEPPmail Secure Email Gateway (SEG)
SEPPmail AG
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84832
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84832
downloads.seppmail.com
https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html
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