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.
Published 1999-12-31 05:00:00
Updated 2008-09-05 20:19:54
Source MITRE
View at NVD,   CVE.org

Threat overview for CVE-1999-1591

Top countries where our scanners detected CVE-1999-1591
Top open port discovered on systems with this issue 80
IPs affected by CVE-1999-1591 24
Threat actors abusing to this issue? Yes
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*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-1999-1591

Probability of exploitation activity in the next 30 days: 9.56%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 95 % EPSS Score History EPSS FAQ

CVSS scores for CVE-1999-1591

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST

References for CVE-1999-1591

Products affected by CVE-1999-1591

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