Is CVE-1999-0874 in the CISA KEV catalog?

No. CVE-1999-0874 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-1999-0874?

CVE-1999-0874 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-1999-0874?

CVE-1999-0874 has an EPSS score of 78.10% (100th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-1999-0874

HIGHEPSS 100th pctl

10.0

CVSS v2

NVD

Description

Buffer overflow in IIS 4.0 allows remote attackers to cause a denial of service via a malformed request for files with .HTR, .IDC, or .STM extensions.

CWE-119Buffer Overflow

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

78.10%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ234905
http://www.ciac.org/ciac/bulletins/j-048.shtml
http://www.eeye.com/html/Research/Advisories/AD06081999.html
https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-019
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A915

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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.