What’s Vulnerable › Vulnerabilities

CVE-1999-1233

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2002-03-09 · updated 2026-06-16

Description

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.

Affected products

• Microsoft Internet Information Server: 4.0

References

• http://support.microsoft.com/support/kb/articles/Q241/5/62.asp
• http://www.securityfocus.com/bid/657
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-039
• https://exchange.xforce.ibmcloud.com/vulnerabilities/3306
• http://support.microsoft.com/support/kb/articles/Q241/5/62.asp
• http://www.securityfocus.com/bid/657
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-039
• https://exchange.xforce.ibmcloud.com/vulnerabilities/3306

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