CVE-2026-49787
HighCVSS 7.5Exploitation Probability (EPSS)
Elevated risk53th percentile - higher than 53% of all known CVEs
Summary
Unrestricted resource allocation vulnerability in Windows HTTP.sys. An unauthorized attacker can remotely cause a denial of service.
Risk Assessment
The attack can exhaust system resources, leading to unavailability of HTTP services and the entire server.
Recommendation
Apply the security patch from Microsoft for the HTTP.sys component.
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-2026-33096High
Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.
- CVE-2026-20929High
Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.
Original NVD description (English source)
Allocation of resources without limits or throttling in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.