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Fencer Vulns
critical 10.0

CVE-1999-0874 in the critical feed json

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…

published 1999-06-16 27 y ago modified 2026-06-16 4 mo ago also EUVD-1999-0855

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
74.7%
EPSS 74.7% chance of exploitation in 30 days, percentile 99.5%
public exploits
6
Metasploit, Exploit-DB

Summary

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.

Timeline

  1. First public exploit (EDB-19248)
  2. Published

Exploit prediction

74.65% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/windows/iis/ms02_018_htr MS02-018 Microsoft IIS 4.0 .HTR Path Overflow metasploit exploit, good rank, 2002-04-10
  • EDB-19248 Microsoft IIS 4.0 - Remote Buffer Overflow (4) remote, 1999-06-15
  • EDB-19247 Microsoft IIS 4.0 - Remote Buffer Overflow (3) remote, 1999-06-15
  • EDB-19246 Microsoft IIS 4.0 - Remote Buffer Overflow (2) remote, 1999-06-15
  • EDB-19245 Microsoft IIS 4.0 - Remote Buffer Overflow (1) remote, 1999-06-15
  • EDB-16468 Microsoft IIS 4.0 - '.htr' Path Overflow (MS02-018) (Metasploit) remote, 2010-04-30

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.