CVE-2026-82486: SiteServer SSCMS Agent Installation Workflow access control

Severity: medium (CVSS 5.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-30 · updated 2026-08-31
Weakness: CWE-266

Description

A vulnerability was found in SiteServer SSCMS 7.4.0. Affected by this issue is some unknown functionality of the component Agent Installation Workflow. Performing a manipulation of the argument SecurityKey results in improper access controls. Remote exploitation of the attack is possible. The attack is considered to have high complexity. The exploitation is known to be difficult. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

siteserver SSCMS: 7.4.0

References

https://github.com/siteserver/cms/issues/3898
https://vuldb.com/cve/CVE-2026-82486
https://vuldb.com/submit/888366
https://vuldb.com/vuln/397036
https://vuldb.com/vuln/397036/cti

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