Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20…
Priority LOW 27Published · 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
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to cause a denial of service via (1) non-ASCII characters in a reverse DNS lookup result from a Received header, which leads to a Receiver service stop, and (2) unspecified vectors involving malformed messages, which causes "unpredictable behavior" that prevents the Security service from processing more messages.
Why it matters now
EPSS 0.01856 79th 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 · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:clearswift:mailsweeper_for_exchange:*:*:*:*:*:*:*:* | up to 4.3.19 | Vulnerable | Clearswift |
| cpe:2.3:a:clearswift:mailsweeper_for_smtp:*:*:*:*:*:*:*:* | up to 4.3.19 | Vulnerable | Clearswift |
- cpe:2.3:a:clearswift:mailsweeper_for_exchange:*:*:*:*:*:*:*:* Versions up to 4.3.19 Vulnerable ·Clearswift
- cpe:2.3:a:clearswift:mailsweeper_for_smtp:*:*:*:*:*:*:*:* Versions up to 4.3.19 Vulnerable ·Clearswift
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-3216
- 2026-10-03 Alias added: GHSA-hm7g-g5vp-28g4
References
More Clearswift Mailsweeper For Exchange vulnerabilities
- TI-2006-03115 Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20… CVSS 2.0HIGH 7.5
Sources
- CVE-2006-3216 · CVE Program
- CVE-2006-3216 · NVD
- FIRST EPSS
- GHSA-hm7g-g5vp-28g4 · 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