How severe is CVE-2006-3920?

CVE-2006-3920 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2006-3920 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3920?

CVE-2006-3920 primarily affects Sun Solaris. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3920?

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

When was CVE-2006-3920 published?

CVE-2006-3920 was published on 2006-07-28 and last updated on 2026-06-16.

CVE-2006-3920

CVE-2006-3920 is a medium-severity vulnerability in Sun Solaris 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: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Sun Solaris
Published: 2006-07-28
Last modified: 2026-06-16

Description

The TCP implementation in Sun Solaris 8, 9, and 10 before 20060726 allows remote attackers to cause a denial of service (resource exhaustion) via a TCP packet with an incorrect sequence number, which triggers an ACK storm.

Frequently asked questions

What is CVE-2006-3920?: The TCP implementation in Sun Solaris 8, 9, and 10 before 20060726 allows remote attackers to cause a denial of service (resource exhaustion) via a TCP packet with an incorrect sequence number, which triggers an ACK storm.
How severe is CVE-2006-3920?: CVE-2006-3920 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-3920 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3920?: CVE-2006-3920 primarily affects Sun Solaris. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3920?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-3920 published?: CVE-2006-3920 was published on 2006-07-28 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:o:sun:solaris:9.0:*:sparc:*:*:*:*:*
cpe:2.3:o:sun:solaris:10.0:*:sparc:*:*:*:*:*
cpe:2.3:o:sun:sunos:5.8:*:*:*:*:*:*:*

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