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CVE-2025-26637 is a security feature bypass in Microsoft Windows BitLocker. The issue is described as a protection mechanism failure that allows an unauthorized attacker with physical access to bypass a BitLocker security control. Available reporting associates the weakness with pre-boot or recovery scenarios in which an attacker can leverage Windows Setup or the Windows Recovery Environment to circumvent expected device protection guarantees, particularly in deployments that rely on TPM-only unlock and do not fully harden boot paths and platform protections. The vulnerability does not describe a traditional memory corruption or remote code execution flaw; instead, it concerns failure of the protection boundary intended to prevent unauthorized offline access or tampering.
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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 and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.