CVE-1999-0867

mediumpriority · track · 38EPSS 0.215 · 98 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

21.5% (98th) EPSS

CVSS 5 · medium

Is it mine?

5 products

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-23

Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.

cvss

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

5.0

010

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

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.5mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:POCsecondary · CVSS-BT (t0sche)

The CWE weakness classes this flaw belongs to.

Public proof-of-concept and weaponised exploit code.

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft commercial internet system= 2.0nvdUScpe:2.3:a:microsoft:commercial_internet_system:*:*:*:*:*:*:*:*
microsoft commercial internet system= 2.5nvdUScpe:2.3:a:microsoft:commercial_internet_system:*:*:*:*:*:*:*:*
microsoft internet information server= 4.0nvdUScpe:2.3:a:microsoft:internet_information_server:*:*:*:*:*:*:*:*
microsoft site server= 3.0nvdUScpe:2.3:a:microsoft:site_server:*:*:*:*:*:*:*:*

Other names and identifiers for this entity.

Which sources assert this record, and when.

published 1999-08-11modified 2026-06-16

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External citations — patches, advisories, analysis.

scry

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