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CVE-1999-0874

81
FAUCET Score

CVE-1999-0874 describes a critical buffer overflow vulnerability in Microsoft IIS 4.0, affecting Windows NT and Windows 2000, which allows remote attackers to cause a denial of service. This flaw is triggered by malformed requests for files with .HTR, .IDC, or .STM extensions. With a CVSS score of 10.0 and a FAUCET Risk Score of 100/100, it presents a severe risk, enabling complete compromise of confidentiality, integrity, and availability with low attack complexity. Although not currently on the KEV catalog, multiple public exploits exist, including a Metasploit module and several ExploitDB entries, indicating a high potential for exploitation. Despite its age and exploit availability, there is no recorded community discussion or media coverage for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
74.65%
Probability of exploitation in next 30 days
EPSS Percentile
99.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Metasploit: MS02-018 Microsoft IIS 4.0 .HTR Path Overflow · Apr 10, 2002
ExploitDB: EDB-16468 · Apr 30, 2010
This CVE's current EPSS score of 0.7465 is in the 99th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/1999/ms99-019
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A915
support.microsoft.com / default.aspx
ciac.org / ciac/bulletins/j-048.shtml
eeye.com / html/Research/Advisories/AD06081999.html