How severe is CVE-2006-4983?

CVE-2006-4983 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2006-4983 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-4983?

CVE-2006-4983 affects Cisco Network Access Control. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-4983?

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-2006-4983 published?

CVE-2006-4983 was published on 2006-09-26 and last updated on 2026-06-16.

CVE-2006-4983

CVE-2006-4983 is a high-severity vulnerability in Cisco Network Access Control with a CVSS 2.0 base score of 7.5. 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 7.5)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Network Access Control
Published: 2006-09-26
Last modified: 2026-06-16

Description

Cisco NAC allows quarantined devices to communicate over the network with (1) DNS, (2) DHCP, and (3) EAPoUDP, which allows attackers to bypass control methods by tunneling network traffic through one of these protocols.

Frequently asked questions

What is CVE-2006-4983?: Cisco NAC allows quarantined devices to communicate over the network with (1) DNS, (2) DHCP, and (3) EAPoUDP, which allows attackers to bypass control methods by tunneling network traffic through one of these protocols.
How severe is CVE-2006-4983?: CVE-2006-4983 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2006-4983 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-4983?: CVE-2006-4983 affects Cisco Network Access Control. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-4983?: 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-2006-4983 published?: CVE-2006-4983 was published on 2006-09-26 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:cisco:network_access_control:*:*:*:*:*:*:*:*

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