CVE-1999-1538

lowpriority · track · 27EPSS 0.253 · 98 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

25.3% (98th) EPSS

CVSS 2.1 · low

Is it mine?

2 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-28

When IIS 2 or 3 is upgraded to IIS 4, ism.dll is inadvertently left in /scripts/iisadmin, which does not restrict access to the local machine and allows an unauthorized user to gain access to sensitive server information, including the Administrator's password.

cvss

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

2.1

010

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

v2.02.1lowAV:L/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 2.9

v2.01.9lowAV:L/AC:L/Au:N/C:P/I:N/A:N/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USLLM-inferredCWE-284USLLM-inferred

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-19147Microsoft IIS 4 (Windows NT) - Remote Web-Based Administrationfunctional · exploit_db

affected products (2)

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:*:*:*:*:*:*:*:*

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 1999-01-14modified 2026-06-16

references (6)

External citations — patches, advisories, analysis.

scry

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