How severe is CVE-2009-4923?

CVE-2009-4923 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2009-4923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4923?

CVE-2009-4923 affects Cisco Asa 5580. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-4923?

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-2009-4923 published?

CVE-2009-4923 was published on 2010-06-29 and last updated on 2026-06-16.

CVE-2009-4923

CVE-2009-4923 is a high-severity vulnerability in Cisco Asa 5580 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.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Asa 5580
Published: 2010-06-29
Last modified: 2026-06-16

Description

Unspecified vulnerability in the DTLS implementation on Cisco Adaptive Security Appliances (ASA) 5580 series devices with software before 8.1(2) allows remote attackers to cause a denial of service (traceback) via TLS fragments, aka Bug ID CSCso53162.

Frequently asked questions

What is CVE-2009-4923?: Unspecified vulnerability in the DTLS implementation on Cisco Adaptive Security Appliances (ASA) 5580 series devices with software before 8.1(2) allows remote attackers to cause a denial of service (traceback) via TLS fragments, aka Bug ID CSCso53162.
How severe is CVE-2009-4923?: CVE-2009-4923 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2009-4923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4923?: CVE-2009-4923 affects Cisco Asa 5580. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-4923?: 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-2009-4923 published?: CVE-2009-4923 was published on 2010-06-29 and last updated on 2026-06-16.

References

http://www.cisco.com/en/US/docs/security/asa/asa81/release/notes/asarn812.html

Affected products (1)

cpe:2.3:h:cisco:asa_5580:*:*:*:*:*:*:*:*

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