CVE-2023-36899
Published: April 11, 2026
Official Description
ASP.NET Elevation of Privilege Vulnerability
Risk Analysis
This vulnerability in ASP.NET allows for elevation of privilege. An attacker could exploit this flaw to gain higher-level access than intended, potentially leading to unauthorized control over affected systems. The confirmed exploitation in the wild makes this an urgent threat.
This vulnerability is actively being exploited in the wild, posing an immediate threat to ASP.NET applications. The nature of elevation of privilege flaws often implies remote exploitability.
Apply the latest security updates and patches for ASP.NET. Implement the principle of least privilege for all users and services interacting with ASP.NET applications.
Technical Analysis
CVE-2023-36899 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2023-36899 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-36899 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1