CVE-2023-35317 Windows Server Update Service (WSUS) Elevation of Privilege Vulnerability
An attacker can exploit a deserialization flaw in WSUS to escalate privileges on affected Windows Server 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-2023-35317?
CVE-2023-35317 is a high-severity unsafe deserialization vulnerability in Microsoft Windows Server 2012, published on 11 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Windows Server Update Service (WSUS) Elevation of Privilege Vulnerability
Weakness: CWE-502
Which versions are affected by CVE-2023-35317?
It affects 4 products.
Products include Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022.
How do I fix CVE-2023-35317?
No fix has been published for CVE-2023-35317 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2023-35317 being exploited?
There is no known exploitation of CVE-2023-35317 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Windows Server 2012
- CVE-2025-59287 Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data
- CVE-2026-69595 Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
- CVE-2026-78445 Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
- CVE-2026-41089 Windows Netlogon Remote Code Execution Vulnerability
- CVE-2024-43639 Windows KDC Proxy Remote Code Execution Vulnerability
Sources
Also known as GHSA-pcx7-hvg4-wg56.