How severe is CVE-1999-0191?

CVE-1999-0191 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-1999-0191 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 53% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0191?

CVE-1999-0191 affects Microsoft Internet Information Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0191?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-0191 published?

CVE-1999-0191 was published on 1997-09-01 and last updated on 2026-06-16.

CVE-1999-0191

CVE-1999-0191 is a medium-severity vulnerability in Microsoft Internet Information Server with a CVSS 2.0 base score of 6.4. Its EPSS exploit-prediction score of 53% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 6.4)
EPSS exploit prediction: 53% (99th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Internet Information Server
Published: 1997-09-01
Last modified: 2026-06-16

Description

IIS newdsn.exe CGI script allows remote users to overwrite files.

Frequently asked questions

What is CVE-1999-0191?: IIS newdsn.exe CGI script allows remote users to overwrite files.
How severe is CVE-1999-0191?: CVE-1999-0191 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-1999-0191 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 53% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0191?: CVE-1999-0191 affects Microsoft Internet Information Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0191?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0191 published?: CVE-1999-0191 was published on 1997-09-01 and last updated on 2026-06-16.

References

http://www.osvdb.org/275

Affected products (1)

cpe:2.3:a:microsoft:internet_information_server:3.0:*:*:*:*:*:*:*

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