How severe is CVE-2006-3216?

CVE-2006-3216 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2006-3216 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3216?

CVE-2006-3216 primarily affects Clearswift Mailsweeper For Exchange. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3216?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-3216 published?

CVE-2006-3216 was published on 2006-06-24 and last updated on 2026-06-16.

CVE-2006-3216

CVE-2006-3216 is a medium-severity vulnerability in Clearswift Mailsweeper For Exchange with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Clearswift Mailsweeper For Exchange
Published: 2006-06-24
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2006-3216?: 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.
How severe is CVE-2006-3216?: CVE-2006-3216 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-3216 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3216?: CVE-2006-3216 primarily affects Clearswift Mailsweeper For Exchange. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3216?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-3216 published?: CVE-2006-3216 was published on 2006-06-24 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:clearswift:mailsweeper_for_exchange:*:*:*:*:*:*:*:*
cpe:2.3:a:clearswift:mailsweeper_for_smtp:*:*:*:*:*:*:*:*

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CVE-2006-3215 — High (CVSS 7.5): Clearswift MAILsweeper for SMTP before 4.3.20 and MAILsweeper for Exchange before 4.3.20 allows remote attackers to…

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