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CVE-2026-44815 is a critical remote code execution vulnerability in the Windows DHCP Client caused by a stack-based buffer overflow. The flaw is triggered when the DHCP client processes crafted data supplied by a malicious DHCP server on the network. Available vendor information indicates the vulnerable condition is tied to handling associated with the DhcpGetOriginalSubnetMask API, and that crafted data from a malicious DHCP server is not used unless that API is called. Successful exploitation can allow arbitrary code execution over the network without user interaction, and the vulnerability affects a broadly deployed Windows networking component.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Критическая RCE-уязвимость в DHCP Client, не требующая учетных данных или взаимодействия с пользователем.
DHCP Client Service remote code execution vulnerability with a high CVSS score of 9.8.
A critical stack-based buffer overflow in Windows DHCP Client that requires no credentials or user action and can lead to full system compromise via crafted network traffic.
A critical memory overflow vulnerability in a Windows automatic internet setup service that can be triggered with malicious network traffic against enterprise Windows 10 environments.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.