Monitoring bypass via excluded directory renaming
Published Dec 18, 2025 · Updated Dec 18, 2025
Detection bypass in BullWall Ransomware Containment allows remote authenticated users with file-write access to evade monitoring. Configurable file and directory exclusion patterns, including $RECYCLE.BIN, omit matching renamed directories from monitoring; earlier releases hard-code this behavior. The bypass applies only when exclusions are configured and prevents monitoring inside the renamed directory, rather than disabling every detection method.
Summary
What happened
Detection bypass in BullWall Ransomware Containment allows remote authenticated users with file-write access to evade monitoring. Configurable file and directory exclusion patterns, including $RECYCLE.BIN, omit matching renamed directories from monitoring; earlier releases hard-code this behavior. The bypass applies only when exclusions are configured and prevents monitoring inside the renamed directory, rather than disabling every detection method.
The record
- CVE
- CVE-2025-62001
- Published
- Dec 18, 2025
- Updated
- Dec 18, 2025
- Vendor
- BullWall
- Product
- Ransomware Containment
- Classifications
- CWE-420, T1562.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 18, 2025CVE publishedPublication date reported by the CVE source.
- Dec 18, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=4.6.0.0 <*
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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