Security readout for executives and security teams
This CVE describes a bypass in the File Blocker feature of Clearswift MAILsweeper for SMTP 4.2. A remote sender could evade attachment filtering policy by altering attachment naming information in a Content-Type header. Business impact depends on whether this legacy mail gateway is still in use and relied on for attachment controls. Exposure appears limited to environments still running Clearswift MAILsweeper for SMTP 4.2 or legacy derivatives with the same File Blocker behavior. Organizations using modern email gateways or retired MAILsweeper deployments are unlikely to be directly exposed. Prioritize discovery over emergency response. The vulnerability is old and severity is unspecified, but continued reliance on this legacy gateway could weaken attachment filtering. If present, plan remediation or replacement through normal security risk management unless other evidence shows active abuse. Mitigation focus: Inventory mail gateways for MAILsweeper for SMTP 4.2 usage.; Check Clearswift or archived vendor guidance for specific fixes or configuration advice.; Replace unsupported legacy mail filtering platforms where practical..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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CVE-2001-1581 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- mailsweeper-bypass-file-blocker(6801)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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