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CVE-2001-1581

HIGH

7.5

CVSS Severity Score

EPSS Score0.0960%

EPSS Percentile22.04th

PublishedDec 31, 2001

Last ModifiedApr 16, 2026

Vulnerability Description

The File Blocker feature in Clearswift MAILsweeper for SMTP 4.2 allows remote attackers to bypass e-mail attachment filtering policies via a modified name in a Content-Type header.

Affected Platforms (CPE)

📦

Clearswift Limited

Mailsweeper

= 4.2

References & Advisories

🔗 http://www.mimesweeper.com/support/technotes/notes/1102.asp

🔗 https://exchange.xforce.ibmcloud.com/vulnerabilities/6801

🔗 http://www.mimesweeper.com/support/technotes/notes/1102.asp

🔗 https://exchange.xforce.ibmcloud.com/vulnerabilities/6801

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