The File Blocker feature in Clearswift MAILsweeper for SMTP 4.2 allows remote attackers…
Priority LOW 35Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.0126 69th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:clearswift_limited:mailsweeper:4.2:*:*:*:*:*:*:* | 4.2 | Vulnerable | Clearswift Limited |
- cpe:2.3:a:clearswift_limited:mailsweeper:4.2:*:*:*:*:*:*:* Versions 4.2 Vulnerable ·Clearswift Limited
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2001-1581
- 2026-10-03 Alias added: GHSA-285q-389j-cw7m
References
More Clearswift Limited Mailsweeper vulnerabilities
- TI-2003-01230 Clearswift MAILsweeper for SMTP 4.3.6 SP1 does not execute custom "on strip unsuccessful"… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2001-1581 · CVE Program
- CVE-2001-1581 · NVD
- FIRST EPSS
- GHSA-285q-389j-cw7m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences