CVE-1999-1591
7.5 · HIGHOverview
CVE-1999-1591 is a high-severity vulnerability affecting microsoft internet_information_server. It was published on December 31, 1999 and has a CVSS 2.0 base score of 7.5 (HIGH).
This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from microsoft. Update internet_information_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|
References
Frequently Asked Questions
What is CVE-1999-1591?
CVE-1999-1591 is a high-severity vulnerability affecting microsoft internet_information_server. It was published on December 31, 1999 and has a CVSS 2.0 base score of 7.5 (HIGH).
How severe is CVE-1999-1591?
This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-1999-1591?
Check the references section for vendor advisories and patches from microsoft. Update internet_information_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-1999-1591?
CyberStrike's AI-powered security agents can automatically detect CVE-1999-1591 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related HIGH CVEs from 1999
View all →finger 0@host on some systems may print information on some user accounts.
finger .@host on some systems may print information on some user accounts.
Windows NT FTP server (WFTP) with the guest account enabled without a password allows an attacker to
Attackers can do a denial of service of IRC by crashing the server.
Windows NT TCP/IP processes fragmented IP packets improperly, causing a denial of service.
Linux cfingerd could be exploited to gain root access.
A race condition in the authentication agent mechanism of sshd 1.2.17 allows an attacker to steal an
Buffer overflow in ircd allows arbitrary command execution.
MetaInfo MetaWeb web server allows users to upload, execute, and read scripts.
The Java Web Server would allow remote users to obtain the source code for CGI programs.
Denial of service in telnet from the Windows NT Resource Kit, by opening then immediately closing a
In some NT web servers, appending a space at the end of a URL may allow attackers to read source cod