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CVE-1999-0910

17
FAUCET Score

CVE-1999-0910 describes a vulnerability in Microsoft Site Server and Commercial Internet System (MCIS) where cookies lack an expiration date. This oversight allows proxy servers to cache these persistent cookies, potentially leading to their inadvertent use by unauthorized individuals, resulting in information disclosure (C:P). Rated as MEDIUM severity with a CVSS score of 5.0 (AV:N/AC:L/Au:N), the vulnerability is easily exploitable over the network without authentication. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this older CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.0CPE matchmatch criteria
cpe:2.3:a:microsoft:commercial_internet_system:2.0:*:*:*:*:*:*:*
2.5CPE matchmatch criteria
cpe:2.3:a:microsoft:commercial_internet_system:2.5:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:microsoft:site_server:3.0:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:a:microsoft:site_server_commerce:3.0:alpha:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
5.78%
Probability of exploitation in next 30 days
EPSS Percentile
92.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0578 is in the 89th percentile among its peer group of 23,705 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/1999/ms99-035
securityfocus.com / bid/625