CVE-1999-1591

high Microsoft
CVSS v3 Base Score
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS Score
12.5%
Exploitation probability in 30 days
Top 6% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Confidentiality
P
Integrity
P
Availability
P
Published: December 31, 1999 (9631 days ago)
Last Modified: April 16, 2026
Vendor: Microsoft
Source: NVD

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.

CWE

NVD-CWE-Other

Affected Products

microsoft internet information servermicrosoft visual interdev

References

🔗 archives.neohapsis.com 🔗 archives.neohapsis.com 🔗 www.securityfocus.com 🔗 archives.neohapsis.com 🔗 archives.neohapsis.com