CVE-1999-0450

highpriority · attend · 47EPSS 0.190 · 97 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

19.0% (97th) EPSS

CVSS 7.5 · high

Is it mine?

5 products

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

In IIS, an attacker could determine a real path using a request for a non-existent URL that would be interpreted by Perl (perl.exe).

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.5

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.06.8mediumAV:N/AC:L/Au:N/C:P/I:P/A:P/E:POCsecondary · CVSS-BT (t0sche)

The CWE weakness classes this flaw belongs to.

CWE-200USLLM-inferred

Public proof-of-concept and weaponised exploit code.

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft internet information server= 3.0nvdUScpe:2.3:a:microsoft:internet_information_server:*:*:*:*:*:*:*:*
microsoft internet information server= 4.0nvdUScpe:2.3:a:microsoft:internet_information_server:*:*:*:*:*:*:*:*
microsoft internet information services= 2.0nvdUScpe:2.3:a:microsoft:internet_information_services:*:*:*:*:*:*:*:*
microsoft internet information services= 5.0nvdUScpe:2.3:a:microsoft:internet_information_services:*:*:*:*:*:*:*:*

Other names and identifiers for this entity.

Which sources assert this record, and when.

published 1999-01-26modified 2026-06-16

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.