CVE-1999-0874

Exp

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.

Published: 1999-06-16 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-1999-0874 is rated High Exploit Risk (90.7/100): CVSS Critical severity, with high exploitation likelihood (EPSS 84.47%, 99th percentile). 5 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-1999-0874

EDB-ID Source Kind Published Link
16468 exploit_db edb 2010-04-30 Exploit-DB ↗
19248 exploit_db edb 1999-06-15 Exploit-DB ↗
19246 exploit_db edb 1999-06-15 Exploit-DB ↗
19245 exploit_db edb 1999-06-15 Exploit-DB ↗
19247 exploit_db edb 1999-06-15 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-1999-0874

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-01 83.54% 84.47% +0.93%
2 2025-10-23 85.83% 83.54% -2.29%
3 2025-10-01 — 85.83% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-1999-0874

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-1999-0874

Affected software / configurations for CVE-1999-0874

Vendor Product Version Raw CPE
microsoft internet_information_server 4.0 cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:*:*:*:*:*
microsoft windows_2000 — cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
microsoft windows_nt — cpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*
microsoft windows_nt 4.0 cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*

References for CVE-1999-0874

cvelogic Threat Intelligence