CVE-1999-1591: microsoft internet_information_server
Vulnerability summary
CVE-1999-1591 is a high (CVSS 7.5) vulnerability in microsoft internet_information_server. EPSS estimates a 11.27% chance of exploitation in the next 30 days, higher than 95.9% of scored vulnerabilities.
Timeline
- 05-07-2007PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
11.27%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
0.00 pp
From 11.27% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Microsoft2 products
1 vendor · 2 products