Vulnerability · Published Aug 30, 2026 · Assigned by VulDB
CVE-2026-82486SiteServer SSCMS Agent Installation Workflow access control
Medium 5.0
In plain English
A medium-severity improper access control in SSCMS from SiteServer. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SiteServer | SSCMS | 7.4.0 |
Weakness: CWE-284, CWE-266 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
References
- VDB-397036 | SiteServer SSCMS Agent Installation Workflow access control vdb-entry, technical-description
- VDB-397036 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- CVE-2026-82486 | CVE Analysis and Report third-party-advisory
- Submit #888366 | SSCMS 7.4.0 Improper Access Controls third-party-advisory
- https://github.com/siteserver/cms/issues/3898 issue-tracking