CVE-1999-1233: IIS 4.0 does not properly restrict access for the initial session request from a user's IP address if the address does n

Published n/a Updated 2026-08-21T04:30:53.017Z

Summary

IIS 4.0 does not properly restrict access for the initial session request from a user's IP address if the address does not resolve to a DNS domain, aka the "Domain Resolution" vulnerability.

Severity

UNKNOWN

Source Attribution

Source: NVD · Updated: 2026-08-21T04:30:53.017Z · Confidence: high

Impact

Based on CVSS vector: n/a — assess confidentiality, integrity, and availability impact via the official vector documentation.

Affected Software

Fix

Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.

References