CVE-2021-27066 Windows Admin Center Security Feature Bypass Vulnerability
Medium 4.3
Published
Updated
Check this codebase for CVE-2021-27066 and fix it if it is affected.
What it is: CVE-2021-27066 is a medium-severity vulnerability in Microsoft Windows Admin Center, published on 11 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-27066 in the wild and no public exploit code.
Affected product: Microsoft Windows Admin Center. 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-2021-27066/ (Markdown: https://insights.sbomify.com/CVE-2021-27066/index.md)
An attacker can bypass security features in Windows Admin Center, potentially undermining protection mechanisms.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-27066?
CVE-2021-27066 is a medium-severity vulnerability in Microsoft Windows Admin Center, published on 11 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Windows Admin Center Security Feature Bypass Vulnerability
Which versions are affected by CVE-2021-27066?
It affects 1 product.
Products include Microsoft Windows Admin Center.
How do I fix CVE-2021-27066?
No fix has been published for CVE-2021-27066 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-27066 being exploited?
There is no known exploitation of CVE-2021-27066 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows Admin Center
- CVE-2026-62873 Microsoft 365 Admin Center Elevation of Privilege Vulnerability
- CVE-2019-0813 Privilege escalation in Windows Admin Center
- CVE-2026-56196 Windows Admin Center (WAC) Remote Code Execution Vulnerability
- CVE-2026-56197 Windows Admin Center (WAC) Remote Code Execution Vulnerability
- CVE-2026-41086 Windows Admin Center in Azure Portal Elevation of Privilege Vulnerability
Sources
Also known as GHSA-x3x8-r6pj-f993.