CVE-2026-20929
HighCVSS 7.5Exploitation Probability (EPSS)
Elevated risk63th percentile - higher than 63% of all known CVEs
Summary
Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.
Risk Assessment
An attacker with network access can gain elevated privileges on the system, potentially taking control of the HTTP server.
Recommendation
Install the latest Windows security updates from Microsoft.
Other vulnerabilities in Windows HTTP.sys
See all- CVE-2026-47291Critical
An integer overflow or wraparound vulnerability in Windows HTTP.sys allows an unauthorized attacker to execute code remotely over a network.
- CVE-2026-62811High
Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
- CVE-2026-62753High
Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
- CVE-2026-62741High
Integer underflow (wrap or wraparound) in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
- CVE-2026-62739High
Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
- CVE-2026-62735High
Heap-based buffer overflow in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
- CVE-2026-61937High
Integer overflow or wraparound in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
- CVE-2026-50420Medium
An out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to disclose information locally.
- CVE-2026-49787High
Unrestricted resource allocation vulnerability in Windows HTTP.sys. An unauthorized attacker can remotely cause a denial of service.
- CVE-2026-33096High
Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.
Original NVD description (English source)
Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.