CVE-1999-0874

highpriority · attend · 76EPSS 0.747 · 99 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

6 exploits · functional

Likely / severe?

74.7% (99th) EPSS

CVSS 10 · high

Is it mine?

5 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

10.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.010highAV:N/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 10 · impact 10

v2.010highAV:N/AC:L/Au:N/C:C/I:C/A:C/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimary

exploits (6)

Public proof-of-concept and weaponised exploit code.

EDB-16468Microsoft IIS 4.0 - '.htr' Path Overflow (MS02-018) (Metasploit)functional · exploit_db
EDB-19245Microsoft IIS 4.0 - Remote Buffer Overflow (1)functional · exploit_db
EDB-19246Microsoft IIS 4.0 - Remote Buffer Overflow (2)functional · exploit_db
EDB-19247Microsoft IIS 4.0 - Remote Buffer Overflow (3)functional · exploit_db
EDB-19248Microsoft IIS 4.0 - Remote Buffer Overflow (4)functional · exploit_db
exploit/windows/iis/ms02_018_htrMS02-018 Microsoft IIS 4.0 .HTR Path Overflowfunctional · metasploit

affected products (5)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft internet information server= 4.0nvdUScpe:2.3:a:microsoft:internet_information_server:*:*:*:*:*:*:*:*
microsoft windows 2000all versionsnvdUScpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
microsoft windows ntall versionsnvdUScpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*
microsoft windows nt= 4.0nvdUScpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 1999-06-16modified 2026-06-16

related (21,043)

Related entries.

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+21038 more

references (10)

External citations — patches, advisories, analysis.

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