CVE-2026-56159
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk54th percentile - higher than 54% of all known CVEs
Summary
A heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code remotely over a network.
Risk Assessment
An attacker could take control of the DHCP server, compromising network service integrity and availability within the organization.
Recommendation
Apply the security update provided by the vendor immediately and restrict trusted DHCP traffic sources in the network.
Other vulnerabilities in Windows DHCP Server
See all- CVE-2026-72979Critical
Use-after-free vulnerability in Windows DHCP Server allows an unauthorized attacker to execute code remotely over a network.
- CVE-2026-69845Critical
Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code remotely over a network.
- CVE-2026-50518Critical
Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code remotely over a network.
- CVE-2026-45602Critical
A vulnerability in Windows DHCP Server allows an unauthorized attacker to perform tampering over a network. No CWE identifier is assigned for this issue.
- CVE-2026-77895High
Out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to deny service over a network.
- CVE-2026-77893High
An out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to cause a denial of service over the network.
- CVE-2026-77891Medium
Out-of-bounds read in Windows DHCP Server allows an authenticated attacker to execute code locally.
- CVE-2026-77890High
A type confusion vulnerability in Windows DHCP Server allows an unauthorized attacker to cause a denial of service over the network.
- CVE-2026-77889High
A type confusion vulnerability in Windows DHCP Server allows an unauthorized attacker to cause a denial of service over the network.
- CVE-2026-77888High
A type confusion vulnerability in Windows DHCP Server allows an unauthorized attacker to cause a denial of service over the network.
Original NVD description (English source)
Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.