Medium severity · published Aug 30, 2026
CVE-2026-82486
SiteServer SSCMS Agent Installation Workflow access control
5.0
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SS
SSCMS · SiteServer
7.4.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82486
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82486
github.com
https://github.com/siteserver/cms/issues/3898
vuldb.com
https://vuldb.com/cve/CVE-2026-82486
vuldb.com
https://vuldb.com/submit/888366
vuldb.com
https://vuldb.com/vuln/397036
vuldb.com
https://vuldb.com/vuln/397036/cti
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