Back to Database
Status published
High
CVE-1999-1591
Microsoft Internet Information Services (IIS) server 4.0 SP4, without certain...
Vulnerability Description
Microsoft Internet Information Services (IIS) server 4.0 SP4, without certain hotfixes released for SP4, does not require authentication credentials under certain conditions, which allows remote attackers to bypass authentication requirements, as demonstrated by connecting via Microsoft Visual InterDev 6.0.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-1999-1591
Credits & Attribution
No credits recorded in the NVD database.
References
More from microsoft
View All →CVE-2025-25199
BCryptGenerateSymmetricKey memory leak
High
7.5
CVE-2024-47083
Power Platform Terraform Provider has Improper Masking of Secrets in Logs
High
8.8
CVE-2024-0590
Microsoft Clarity <= 0.9.3 - Cross-Site Request Forgery to Stored Cross-Site Scripting
Medium
6.1
CVE-2023-30846
typed-rest-client vulnerable to potential leak of authentication data to 3rd parties
Critical
9.1
CVE-2021-3339
ModernFlow before 1.3.00.208 does not constrain web-page access to members...
Medium
4.3
Affected Vendor
microsoft
View all reports →Affected Software
internet information server, visual interdev
Vulnerable Versions:
4.0, 6.0
Timeline
Official Publish:
July 5th, 2007
Last Modified:
September 16th, 2024
Added to House:
July 17th, 2026
CVSS Vectors
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.