CVE-2025-62002 identifies a vulnerability in BullWall's Ransomware Containment product, specifically in versions 4.6.0.0, 4.6.0.6, 4.6.0.7, and 4.6.1.4. The product's ransomware detection mechanism relies on counting the number of file modifications to trigger alerts. This approach assumes ransomware encrypts many files rapidly, thus generating numerous modification events. However, the vulnerability arises because the detection logic does not account for the size or significance of individual file modifications. An authenticated attacker can exploit this by encrypting a single large file, which does not exceed the modification count threshold, thereby evading detection. This is a classic example of CWE-358, where a security check is improperly implemented, leading to a bypass. The CVSS v3.1 score is 4.3 (medium), reflecting that the attack vector is network-based with low complexity, requires privileges (authenticated attacker), and does not impact confidentiality or availability but does degrade integrity by allowing undetected encryption. No user interaction is needed, and the scope is unchanged as the vulnerability affects only the BullWall product. No patches are currently linked, indicating that organizations must monitor vendor advisories closely. The lack of known exploits in the wild suggests this is a newly disclosed issue. The vulnerability highlights a design weakness in ransomware detection relying solely on modification counts without considering file size or other heuristics.

For European organizations, this vulnerability poses a risk of ransomware attacks going undetected if attackers leverage the single large file encryption technique. This could lead to significant data integrity loss, as encrypted files may not be restored without backups or decryption keys. Critical sectors such as finance, healthcare, and government entities that rely on BullWall Ransomware Containment for protection may experience delayed incident response, increasing downtime and recovery costs. The inability to detect such attacks promptly could also lead to regulatory compliance issues under GDPR, especially if data availability or integrity is compromised. While the vulnerability does not directly affect confidentiality or availability, the integrity impact and potential operational disruption are non-trivial. Since exploitation requires authentication, insider threats or compromised credentials pose the primary risk vector. The medium severity suggests that while the threat is not immediately critical, it should be addressed promptly to prevent exploitation in targeted attacks.

Organizations should implement multiple layers of defense beyond relying solely on BullWall's modification count detection. Specifically, they should: 1) Monitor for unusual large file modifications or encryptions using file integrity monitoring tools that consider file size and entropy changes. 2) Enforce strict access controls and multi-factor authentication to reduce the risk of credential compromise that could enable authenticated attacks. 3) Maintain comprehensive and frequent backups of critical data to enable recovery in case of encryption. 4) Apply vendor patches or updates as soon as they become available to address this vulnerability. 5) Supplement ransomware detection with behavioral analytics and anomaly detection systems that do not rely solely on modification counts. 6) Conduct regular security audits and penetration testing to identify potential bypasses in ransomware defenses. 7) Educate staff on credential security and insider threat risks to minimize the chance of authenticated attackers. 8) Review and adjust alert thresholds to consider file size or other heuristics if configurable within BullWall or complementary tools.