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CVE-2025-48800 is a Windows BitLocker security feature bypass vulnerability in the Windows Recovery Environment (WinRE). The flaw stems from a protection mechanism failure in WinRE’s handling of ReAgent.xml scheduled operations, specifically the Offline Scanning path. WinRE does not strictly validate the arguments used by the Offline Scanning application, allowing abuse of tttracer.exe to trace Command Prompt without triggering the normal BitLocker re-lock behavior. In the vulnerable state, WinRE has already auto-unlocked the BitLocker-protected operating system volume after validating the recovery environment, but the re-lock safeguard intended to protect access when risky tools are launched can be bypassed. An attacker with physical access can therefore obtain command execution in the recovery environment while the protected volume remains accessible, defeating BitLocker device encryption protections on the system storage device.
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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.
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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.
A set of four WinRE zero-days enabling arbitrary command execution, boot of untrusted recovery images, and direct decryption of BitLocker volumes without authentication.
A BitLocker security feature bypass vulnerability by targeting ReAgent.xml parsing, allowing attackers with physical access to bypass BitLocker protections.
A WinRE ReAgent.xml scheduled Offline Scanning logical vulnerability that allows abuse of tttracer.exe to proxy-execute cmd.exe in auto-unlock state, bypassing BitLocker protections.
A BitLocker security feature bypass vulnerability identified as more likely to be exploited.
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.