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A critical elevation of privilege vulnerability in Windows NTLM v1 caused by improper implementation of authentication mechanisms. The flaw affects modern Microsoft platforms including Windows 11 24H2, Windows Server 2022 23H2, and Windows Server 2025. Available reporting indicates that an unauthenticated remote attacker can exploit the weakness when NTLMv1 authentication is permitted, enabling privilege escalation through the legacy authentication protocol.
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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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An elevation of privilege vulnerability involving Windows NTLM v1.
A critical Windows NTLMv1 elevation of privilege vulnerability affecting newer Windows and Windows Server releases. It is remotely exploitable and can be mitigated by disabling NTLMv1 via LmCompatibilityLevel.
A critical NTLMv1 elevation-of-privilege vulnerability affecting newer Windows and Server releases. It is remotely exploitable and can be mitigated by disabling NTLMv1 via LmCompatibilityLevel.
A critical privilege escalation vulnerability in Windows NTLM V1 caused by improper authentication implementation, potentially enabling full compromise of confidentiality, integrity, and availability.
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.