CVE-2025-27740 Active Directory Certificate Services Elevation of Privilege Vulnerability
An authorized attacker can elevate privileges over the network due to weak authentication in Windows Active Directory Certificate Services.
- 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-2025-27740?
CVE-2025-27740 is a high-severity vulnerability in Microsoft Windows Server 2008, published on 8 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Weak authentication in Windows Active Directory Certificate Services allows an authorized attacker to elevate privileges over a network.
Weakness: CWE-1390
Which versions are affected by CVE-2025-27740?
It affects 7 products.
Products include Microsoft Windows Server 2008, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2 and 1 more.
How do I fix CVE-2025-27740?
No fix has been published for CVE-2025-27740 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-27740 being exploited?
There is no known exploitation of CVE-2025-27740 in the wild and no public exploit code.
Public exploit code: 2 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Windows Server 2008
Sources
Also known as GHSA-w4rq-mvcf-xc7h.