Strix
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CVE-1999-1591

UnknownEPSS 11.27%

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

EPSS Probability
11.27%

95.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersionsUpdate
MicrosoftInternet Information Server4.0Sp4
MicrosoftVisual Interdev6.0—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-1999-1591?
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.
How severe is CVE-1999-1591?
Severity scoring for CVE-1999-1591 is pending analysis. The EPSS model estimates a 11.27% probability of exploitation in the next 30 days.
How do I fix CVE-1999-1591?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-1999-1591?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST