Is CVE-2001-0239 in the CISA KEV catalog?

No. CVE-2001-0239 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2001-0239?

CVE-2001-0239 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2001-0239?

CVE-2001-0239 has an EPSS score of 27.96% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2001-0239

HIGHEPSS 98th pctl

7.5

CVSS v2

NVD

Description

Microsoft Internet Security and Acceleration (ISA) Server 2000 Web Proxy allows remote attackers to cause a denial of service via a long web request with a specific type.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

27.96%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

http://www.ciac.org/ciac/bulletins/l-073.shtml
http://www.securityfocus.com/archive/1/176912
http://www.securityfocus.com/archive/1/177160
http://www.securityfocus.com/archive/1/179986
http://www.securityfocus.com/bid/2600
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-021
https://exchange.xforce.ibmcloud.com/vulnerabilities/6383

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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.