Privilege escalation in Siteserver Sscms
CVE-2026-82486
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (24.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Siteserver Sscms — versions 7.4.0
Weakness classification (CWE)
References
- vuldb.com/vuln/397036 (technical-description, vdb-entry)
- vuldb.com/vuln/397036/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-82486 (third-party-advisory)
- vuldb.com/submit/888366 (third-party-advisory)
- github.com/siteserver/cms/issues/3898 (issue-tracking)
Frequently asked questions
- What is CVE-2026-82486?
- CVE-2026-82486 is a medium-severity vulnerability in Siteserver Sscms, classified under Incorrect Privilege Assignment. CVSS score: 5.0/10. Published 2026-08-30.
- How severe is CVE-2026-82486?
- Medium severity. CVSS v3 base score is 5.0 out of 10.