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CVE-2026-62823 is a remote code execution vulnerability in Windows DHCP Server caused by a heap-based buffer overflow. The flaw allows an unauthorized attacker on an adjacent network to send crafted network traffic to a vulnerable DHCP Server instance and trigger memory corruption in the server process. Microsoft classifies the issue as CWE-122 and assigns CVSS v3.1 vector AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating low attack complexity, no required privileges, and no user interaction. Successful exploitation can result in arbitrary code execution in the context of the affected service, with high impact to confidentiality, integrity, and availability.
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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.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A heap-based buffer overflow remote code execution vulnerability in Windows DHCP Server that allows an unauthorized attacker to execute code over an adjacent network.
A critical remote code execution vulnerability in Windows DHCP Server caused by a heap-based buffer overflow, allowing unauthenticated adjacent-network code execution via crafted packets.
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.