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CVE-2025-26644 is a vulnerability in the automated recognition mechanism of Windows Hello, where inadequate detection or handling of adversarial input perturbations allows a local, unauthorized attacker to perform spoofing. The flaw lies in the biometric authentication process, which fails to robustly distinguish between legitimate and adversarially manipulated input, enabling attackers to bypass authentication controls.
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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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows kernel driver elevation of privilege vulnerability that can be abused to disable security controls and escalate privileges.
A vulnerability in Windows Kerberos that allows attackers to forge authentication tokens and gain unauthorized access.
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.