AUGUST 4, 2026
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Case File

CVE-1999-1538

LOW · CVSS 2.1 EPSS 25.46%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 1999-01-14 · Last synced 2026-08-04

CyberRota Analysis

This is a low severity vulnerability with a CVSS score of 2.1. Its EPSS score suggests a 25.5% probability of exploitation in the next 30 days.

CVE
CVE-1999-1538
Severity
LOW
CVSS
2.1
EPSS
25.46%

Original NVD Description

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.