Is CVE-2003-0567 in the CISA KEV catalog?

No. CVE-2003-0567 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0567?

CVE-2003-0567 has a CVSS v2 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2003-0567?

CVE-2003-0567 has an EPSS score of 16.58% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2003-0567

HIGHEPSS 97th pctl

7.8

CVSS v2

NVD

Description

Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.

CWE-20Improper Input Validation

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

16.58%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

http://lists.grok.org.uk/pipermail/full-disclosure/2003-July/006743.html
http://www.cert.org/advisories/CA-2003-15.html
http://www.cert.org/advisories/CA-2003-17.html
http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml
http://www.kb.cert.org/vuls/id/411332
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5603

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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.