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CVE-2001-0643

26
FAUCET Score

CVE-2001-0643 describes a vulnerability in Microsoft Internet Explorer 5.5 where it fails to display the Class ID (CLSID) when it is appended to a filename. This oversight could be exploited to deceive users into executing malicious programs by masking the true file type, making a dangerous executable appear as a benign document. Rated with a CVSS score of 5.0 (MEDIUM), this vulnerability has a low attack complexity and requires no authentication, with the primary impact being a potential compromise of integrity. While not actively exploited in the wild and not listed on CISA's KEV catalog, an exploit (EDB-20774) is publicly available on ExploitDB, though there is no record of Metasploit or Nuclei modules, nor any community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
5.5CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:5.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
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
10.36%
Probability of exploitation in next 30 days
EPSS Percentile
95.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-20774 · Apr 17, 2001
This CVE's current EPSS score of 0.1036 is in the 94th percentile among its peer group of 23,684 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

exchange.xforce.ibmcloud.com / vulnerabilities/6426
vil.nai.com / vil/virusSummary.asp
ExploitPatchVendor Advisory
guninski.com / clsidext.html
osvdb.org / 7858
sarc.com / avcenter/venc/data/vbs.postcard%40mm.html
securityfocus.com / archive/1/176909
ExploitPatchVendor Advisory
securityfocus.com / bid/2612