CVE-2021-33781 Azure AD Security Feature Bypass Vulnerability
High 8.1
Published
Updated
Check this codebase for CVE-2021-33781 and fix it if it is affected.
What it is: CVE-2021-33781 is a high-severity vulnerability in Microsoft Windows 10, published on 14 Jul 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-2021-33781 in the wild and no public exploit code.
Affected product: Microsoft Windows 10. 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-2021-33781/ (Markdown: https://insights.sbomify.com/CVE-2021-33781/index.md)
Attackers can bypass Azure AD security features on Windows systems, requiring immediate patching by system administrators.
- 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-2021-33781?
CVE-2021-33781 is a high-severity vulnerability in Microsoft Windows 10, published on 14 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Azure AD Security Feature Bypass Vulnerability
Which versions are affected by CVE-2021-33781?
It affects 3 products.
Products include Microsoft Windows 10, Microsoft Windows Server 2016, Microsoft Windows Server 2019.
How do I fix CVE-2021-33781?
No fix has been published for CVE-2021-33781 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-33781 being exploited?
There is no known exploitation of CVE-2021-33781 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10
- CVE-2015-2426 Microsoft Windows Adobe Type Manager Library Remote Code Execution
- CVE-2015-1769 Microsoft Windows Mount Manager Privilege Escalation
- CVE-2020-1467 Windows Hard Link Elevation of Privilege Vulnerability
- CVE-2021-26424 Windows TCP/IP Remote Code Execution Vulnerability
- CVE-2021-28476 Windows Hyper-V Remote Code Execution Vulnerability
Sources
Also known as GHSA-h3q4-8mmf-5g36.