CryptoPro Secure Disk CVE-2025-59324

The concrete prerequisite from the description is that a LUKS-encrypted volume must be present/handled by the product - that specific condition is what makes CPSD fail its encryption validation and skip every CryptoPro file-integrity check. Exploitation therefore requires the affected component (CryptoPro Secure Disk for Bitlocker before v7.7.4) to be in use AND a LUKS encryption context to be reachable by the attacker; it is NOT a bypass that fires against a default BitLocker-only deployment with no LUKS involvement. Practically limiting factors: the attacker needs the ability to influence the encrypted-volume state on the target endpoint, which implies local/physical proximity despite the CVSS AV:N label, so this is not a mass-remote, unauthenticated internet-facing exploit against default configurations.

The signals conflict and must be weighed rather than taken at face value. The MITRE-supplied CVSS 3.1 vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:N, base 9.1) claims a remote, unauthenticated, network attack - but the described defect is an integrity-verification bypass in a full-disk-encryption product, which in practice is exercised by an actor with local or physical access to the endpoint (a classic evil-maid / tamper scenario), not over a network. This AV:N-vs-local-nature discrepancy should be verified with the vendor; treated as network-remote the score is inflated. Countervailing signals point to lower urgency: EPSS is 0.11% (1st percentile), it is NOT on CISA KEV, and no weaponized exploit is public - only a Black Hat research disclosure. The realistic impact is high for the specific integrity guarantee (an attacker who can touch the disk can plant tampered files that evade detection), but the addressable population is small and exploitation is not automatable at scale. Organizations running this exact product for compliance-driven endpoint integrity should still patch promptly, since the flaw negates the core assurance they bought the product for; even a mid-sized municipal IT team in kielce running these encrypted endpoints should schedule the 7.7.4 upgrade rather than defer it, but for everyone else this is a low-prevalence, low-probability item rather than an emergency.

An attacker who gains brief physical or local access to a laptop protected by CryptoPro Secure Disk for Bitlocker attaches or crafts a LUKS-encrypted volume so the product's flawed detection engages, which causes CPSD to skip all file-integrity checks. The attacker then modifies protected system or boot files (e.g., planting a backdoored binary), and because integrity verification is bypassed the tampering is not detected on subsequent boot. No public exploit code exists yet; the technique is described in a Black Hat USA 2026 research presentation.