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

> Attackers can bypass access controls in the Agent Installation Workflow by manipulating the SecurityKey argument, potentially gaining unauthorized access.

- **Severity:** Low 2.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 30 Aug 2026
- **Updated:** 31 Aug 2026
- **Also known as:** GHSA-v975-p34v-4fvr

## What is CVE-2026-82486?

CVE-2026-82486 is a low-severity missing authorization vulnerability in SiteServer SSCMS, published on 30 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### 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.

Weakness: CWE-284 (Improper Access Control), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2026-82486?


## How do I fix CVE-2026-82486?

No fix has been published for CVE-2026-82486 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-82486 being exploited?

There is no known exploitation of CVE-2026-82486 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-82486 and fix it if it is affected.

What it is: CVE-2026-82486 is a low-severity missing authorization vulnerability in SiteServer SSCMS, published on 30 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-82486 in the wild and no public exploit code.

Affected product: SiteServer SSCMS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-82486/ (Markdown: https://insights.sbomify.com/CVE-2026-82486/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-82486
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-82486
- OSV: https://osv.dev/vulnerability/CVE-2026-82486

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-82486/
Summaries are generated and may contain mistakes; the official description above is the record.