Is CVE-2006-4911 in the CISA KEV catalog?

No. CVE-2006-4911 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2006-4911?

CVE-2006-4911 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2006-4911?

CVE-2006-4911 has an EPSS score of 4.20% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2006-4911?

Upgrade ips sensor software to 5.1(2) or later.

CVE & CISA-KEV Catalog

CVE-2006-4911

HIGHEPSS 90th pctl

7.5

CVSS v2

NVD

Description

Unspecified vulnerability in Cisco IPS 5.0 before 5.0(6p2) and 5.1 before 5.1(2), when running in inline or promiscuous mode, allows remote attackers to bypass traffic inspection via a "crafted sequence of fragmented IP packets".

How to fix

Remediation Available

ips sensor softwareNVD

Affected:>= 5.1, < 5.1(2)Fixed in:5.1(2)CVE-2006-4911derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

4.20%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Vendor Advisory1

cisco.com

Third-Party Advisory5

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.