CVE-1999-1591
Last modified
CVE-1999-1591 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 11.27% chance of exploitation in the next 30 days.
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.
Metrics
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Internet Information Server | 4.0 | Sp4 |
| Microsoft | Visual Interdev | 6.0 | — |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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