Is CVE-2003-0526 in the CISA KEV catalog?

No. CVE-2003-0526 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0526?

CVE-2003-0526 has a CVSS v2 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2003-0526?

CVE-2003-0526 has an EPSS score of 22.47% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2003-0526

MEDIUMEPSS 97th pctl

6.8

CVSS v2

NVD

Description

Cross-site scripting (XSS) vulnerability in Microsoft Internet Security and Acceleration (ISA) Server 2000 allows remote attackers to inject arbitrary web script via a URL containing the script in the domain name portion, which is not properly cleansed in the default error pages (1) 500.htm for "500 Internal Server error" or (2) 404.htm for "404 Not Found."

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

22.47%probability of exploitation in 30 days

97thpercentile

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

References

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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.