HOMEVULNERABILITIESCVE-2006-3216
MEDIUM

CVE-2006-3216

NVD-CWE-OtherPublished: June 24, 2006· Updated: Jun 16, 2026

5.0
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2006-3216 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected Vendors & Products

clearswift2 product(s)
mailsweeper for exchangemailsweeper for smtp
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://secunia.com/advisories/20756
PATCHhttp://www.securityfocus.com/bid/18584
PATCHhttp://secunia.com/advisories/20756
PATCHhttp://www.securityfocus.com/bid/18584

All References (16)

→
http://download.mimesweeper.com/www/TechnicalDocumentation/ReadMe_MSW_4%2C3%2C20.htm
→
http://secunia.com/advisories/20756Patch · Vendor Advisory
→
http://www.osvdb.org/26738
→
http://www.osvdb.org/26739
→
http://www.securityfocus.com/bid/18584Patch
→
http://www.vupen.com/english/advisories/2006/2473
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/27303
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/27305
→
http://download.mimesweeper.com/www/TechnicalDocumentation/ReadMe_MSW_4%2C3%2C20.htm
→
http://secunia.com/advisories/20756Patch · Vendor Advisory
→
http://www.osvdb.org/26738
→
http://www.osvdb.org/26739
→
http://www.securityfocus.com/bid/18584Patch
→
http://www.vupen.com/english/advisories/2006/2473
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/27303

Quick Facts

CVE IDCVE-2006-3216
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessNVD-CWE-Other
CISA KEVNo
Affected1 vendor(s)
PublishedJun 24, 2006

Related CVEs (NVD-CWE-Other)

CVE-2010-1988
10.0
CVE-2010-0121
10.0
CVE-2009-3845
10.0
CVE-2010-0689
10.0
CVE-2009-4143
10.0
CVE-2011-0385
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2006-3216 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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