How severe is CVE-2008-2121?

CVE-2008-2121 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2008-2121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-2121?

CVE-2008-2121 primarily affects Sun Sunos. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-2121?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2008-2121 published?

CVE-2008-2121 was published on 2008-05-09 and last updated on 2026-06-16.

CVE-2008-2121

CVE-2008-2121 is a high-severity vulnerability in Sun Sunos with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-16.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Sun Sunos
Published: 2008-05-09
Last modified: 2026-06-16

Description

The TCP implementation in Sun Solaris 8, 9, and 10 allows remote attackers to cause a denial of service (CPU consumption and new connection timeouts) via a TCP SYN flood attack.

Frequently asked questions

What is CVE-2008-2121?: The TCP implementation in Sun Solaris 8, 9, and 10 allows remote attackers to cause a denial of service (CPU consumption and new connection timeouts) via a TCP SYN flood attack.
How severe is CVE-2008-2121?: CVE-2008-2121 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2008-2121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-2121?: CVE-2008-2121 primarily affects Sun Sunos. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-2121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2008-2121 published?: CVE-2008-2121 was published on 2008-05-09 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:o:sun:sunos:5.8:*:*:*:*:*:*:*
cpe:2.3:o:sun:sunos:5.9:*:*:*:*:*:*:*
cpe:2.3:o:sun:sunos:5.10:*:*:*:*:*:*:*

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