CVE-2021-26866 Windows Update Service Elevation of Privilege Vulnerability
An attacker can exploit a symlink vulnerability in the Windows Update Service to gain elevated privileges on affected Windows systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26866?
CVE-2021-26866 is a high-severity vulnerability in Microsoft Windows 10, published on 11 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Windows Update Service Elevation of Privilege Vulnerability
Weakness: CWE-59
Which versions are affected by CVE-2021-26866?
It affects 3 products.
Products include Microsoft Windows 10, Microsoft Windows Server 2016, Microsoft Windows Server 2019.
How do I fix CVE-2021-26866?
No fix has been published for CVE-2021-26866 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-26866 being exploited?
There is no known exploitation of CVE-2021-26866 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-8pv9-vfqj-q49w.