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CVE-1999-0891

44
FAUCET Score

CVE-1999-0891 describes a critical vulnerability in Microsoft Internet Explorer 5, where its "download behavior" feature could be abused by remote attackers to read arbitrary files on a user's system. This medium-severity flaw (CVSS 5.0) has a high FAUCET Risk Score of 98/100, indicating significant potential for impact despite its age. While there is no evidence of active exploitation or KEV listing, public exploit code exists on ExploitDB, and its EPSS score suggests a higher-than-average likelihood of exploitation. Community discussion and media coverage for this vulnerability are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
5.0CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:5.0:*:*:*:*:*:*:*

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
42.58%
Probability of exploitation in next 30 days
EPSS Percentile
98.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-19530 · Sep 27, 1999
This CVE's current EPSS score of 0.4258 is in the 99th percentile among its peer group of 23,725 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/ms99-040
support.microsoft.com / default.aspx
ciac.org / ciac/bulletins/k-002.shtml
kb.cert.org / vuls/id/37828
US Government Resource
osvdb.org / 11274
securityfocus.com / bid/674