How severe is CVE-1999-0910?

CVE-1999-0910 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0910 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0910?

CVE-1999-0910 primarily affects Microsoft Commercial Internet System. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0910?

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

When was CVE-1999-0910 published?

CVE-1999-0910 was published on 1999-09-10 and last updated on 2026-06-16.

CVE-1999-0910

CVE-1999-0910 is a medium-severity vulnerability in Microsoft Commercial Internet System with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Commercial Internet System
Published: 1999-09-10
Last modified: 2026-06-16

Description

Microsoft Site Server and Commercial Internet System (MCIS) do not set an expiration for a cookie, which could then be cached by a proxy and inadvertently used by a different user.

Frequently asked questions

What is CVE-1999-0910?: Microsoft Site Server and Commercial Internet System (MCIS) do not set an expiration for a cookie, which could then be cached by a proxy and inadvertently used by a different user.
How severe is CVE-1999-0910?: CVE-1999-0910 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-0910 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0910?: CVE-1999-0910 primarily affects Microsoft Commercial Internet System. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0910?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0910 published?: CVE-1999-0910 was published on 1999-09-10 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:microsoft:commercial_internet_system:2.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:commercial_internet_system:2.5:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:site_server:3.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:site_server_commerce:3.0:alpha:*:*:*:*:*:*

More vulnerabilities in Microsoft Commercial Internet System

CVE-2000-0053 — High (CVSS 7.5): Microsoft Commercial Internet System (MCIS) IMAP server allows remote attackers to cause a denial of service via a…
CVE-1999-0777 — High (CVSS 7.5): IIS FTP servers may allow a remote attacker to read or delete files on the server, even if they have "No Access"…
CVE-2000-0246 — Medium (CVSS 5.0): IIS 4.0 and 5.0 does not properly perform ISAPI extension processing if a virtual directory is mapped to a UNC share,…
CVE-1999-0867 — Medium (CVSS 5.0): Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.
CVE-1999-0861 — Low (CVSS 2.6): Race condition in the SSL ISAPI filter in IIS and other servers may leak information in plaintext.

All CVEs affecting Microsoft Commercial Internet System →