CVE-2025-59322 in Secure Disk for BitLocker
Summary
by MITRE • 08/12/2026
CPSD CryptoPro Secure Disk for Bitlocker before v7.7.4 fails to properly handle decryption errors and allows encrypted volumes to be mounted as plaintext.
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Analysis
by VulDB Data Team • 08/12/2026
This vulnerability affects CPSD CryptoPro Secure Disk for BitLocker versions prior to 7.7.4 and represents a critical cryptographic failure that undermines the fundamental security assumptions of full disk encryption. The flaw manifests when the system encounters decryption errors during volume mounting operations, specifically failing to properly validate or handle these error conditions. Instead of rejecting the corrupted or improperly decrypted data, the software incorrectly presents the encrypted volumes as plaintext mounts, effectively bypassing the encryption protection mechanism entirely.
The technical implementation error stems from inadequate error handling within the decryption pipeline where cryptographic failures are not properly detected or managed. When BitLocker encounters corrupted sectors or authentication failures during the decryption process, the system should either fail the mount operation completely or attempt recovery mechanisms that maintain data integrity. However, in affected versions, the software's error handling logic is flawed, allowing malformed decrypted data to be presented as valid plaintext to the operating system. This creates a scenario where an attacker could potentially manipulate the encryption process to force the system into a state where encrypted volumes appear unencrypted, while the underlying data remains protected through other means.
The operational impact of this vulnerability extends beyond simple credential theft or unauthorized access. When encrypted volumes are mounted as plaintext, legitimate users may unknowingly access what they believe to be decrypted data while the actual cryptographic protection remains intact but the system behavior becomes unpredictable. This creates confusion in forensic analysis and system administration processes, as administrators cannot trust that mounting operations have successfully decrypted volumes. The vulnerability also enables potential privilege escalation attacks where an attacker could exploit this behavior to gain access to system resources or perform unauthorized modifications to what appears to be plaintext data while the cryptographic layer remains active.
From a security standards perspective, this vulnerability aligns with CWE-254 weakness category related to "Effective Privilege, Security, and Trust Model" and represents a failure in proper error handling that violates fundamental security principles. The issue also maps to ATT&CK technique T1003.002 for os credential dumping but operates at a lower level through volume mount manipulation rather than direct credential access. Organizations using this encryption solution face significant risk of data exposure, particularly in environments where physical device theft could lead to unauthorized access to what appears to be plaintext volumes while maintaining the underlying cryptographic protection.
Mitigation strategies should prioritize immediate patch deployment to version 7.7.4 or later, which contains proper error handling mechanisms for decryption failures. System administrators should conduct thorough audits of all affected systems and implement monitoring for unusual mount operations that may indicate this vulnerability being exploited. Additional protective measures include implementing strict access controls for encryption management interfaces, regular security assessments of encryption software configurations, and maintaining detailed logs of all volume mounting activities to detect anomalous behavior patterns. Organizations should also consider implementing multi-factor authentication for administrative access to encryption management systems and establish incident response procedures specifically addressing potential exploitation of this vulnerability type.