CVE-2025-55337 is a vulnerability identified in Microsoft Windows 11 Version 24H2 (build 10.0.26100.0) that affects the BitLocker disk encryption feature. The root cause is an improper enforcement of behavioral workflow, classified under CWE-841, which refers to failures in enforcing the correct sequence or conditions of operations within a system's workflow. BitLocker is designed to protect data confidentiality by encrypting the entire disk and requiring authentication or hardware-based keys to decrypt data. This vulnerability allows an attacker with physical access to the device to bypass BitLocker protections by exploiting the flawed workflow enforcement, potentially gaining unauthorized access to encrypted data without needing user credentials or interaction. The CVSS v3.1 score is 6.1 (medium), reflecting that the attack vector requires physical access (AV:P), has low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N). The impact on confidentiality and integrity is high, as the attacker can access or manipulate encrypted data, but availability is unaffected. There are no known exploits in the wild at the time of publication, and no patches have been released yet. The vulnerability was reserved in August 2025 and published in October 2025. This issue highlights a critical gap in BitLocker's enforcement of its security workflow, undermining the trust in disk encryption on affected Windows 11 systems.

The primary impact of CVE-2025-55337 is the compromise of data confidentiality and integrity on devices running Windows 11 Version 24H2 using BitLocker encryption. Attackers with physical access can bypass encryption protections, exposing sensitive data such as corporate intellectual property, personal information, and credentials stored on the device. This can lead to data breaches, intellectual property theft, and potential lateral movement within an organization if the compromised device is part of a larger network. The integrity impact means attackers could alter data undetected, potentially injecting malicious code or tampering with critical files. Although availability is not affected, the breach of confidentiality and integrity can have severe operational and reputational consequences. Organizations relying heavily on BitLocker for endpoint security, especially in regulated industries like finance, healthcare, and government, face increased risk. The requirement for physical access limits remote exploitation but raises concerns for lost, stolen, or inadequately secured devices.

Until a patch is released by Microsoft, organizations should implement strict physical security controls to prevent unauthorized access to devices, including secure storage, access logging, and tamper-evident measures. Employ hardware security modules or Trusted Platform Module (TPM) protections to strengthen BitLocker key management. Enable multifactor authentication for device access and consider additional encryption layers or endpoint detection and response (EDR) solutions to monitor suspicious activity. Regularly audit and inventory devices to quickly identify missing or compromised hardware. Educate users on the importance of physical security and reporting lost or stolen devices immediately. Once Microsoft releases a patch, prioritize testing and deployment across all affected Windows 11 Version 24H2 systems. Additionally, review and update incident response plans to address potential data breaches resulting from this vulnerability.