CVE-2026-44815
Microsoft · Windows DHCP Client
A stack-based buffer overflow in the Windows DHCP Client allows unauthenticated remote attackers to execute code via crafted network packets.
Executive summary
A critical stack-based buffer overflow in the Windows DHCP Client exposes systems to unauthenticated remote code execution.
Vulnerability
The vulnerability is a stack-based buffer overflow within the DHCP client processing logic. An unauthenticated attacker can trigger this condition by sending specially crafted network packets to a target system, resulting in arbitrary code execution.
Business impact
With a CVSS score of 9.8, this vulnerability poses a severe risk to any Windows-based environment. Successful exploitation allows for complete system compromise without user interaction, which could facilitate the rapid spread of malware or ransomware across the network.
Remediation
Immediate Action: Install the latest Windows security patches provided by Microsoft to address the DHCP client overflow.
Proactive Monitoring: Monitor network traffic for unusual or malformed DHCP traffic patterns that may indicate an attempt to trigger the buffer overflow.
Compensating Controls: Implement network-level segmentation to limit the exposure of sensitive hosts to potentially untrusted DHCP traffic.
Exploitation status
Public Exploit Available: Unknown
Analyst recommendation
This vulnerability is highly dangerous due to its potential for wormable exploitation. Security teams should ensure that all Windows systems are fully patched and that update management processes are functioning correctly to deploy this fix across the entire fleet immediately.