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CVE-2001-1243

48
FAUCET Score

CVE-2001-1243 describes a denial-of-service vulnerability in Microsoft IIS 4.0 and 5.0, specifically within the Scripting.FileSystemObject of asp.dll. Attackers can trigger a server crash by either creating an ASP program that attempts to open a file with an MS-DOS device name, or by remotely injecting such a device name into existing ASP applications. This vulnerability carries a CVSS score of 5.0 (Medium), indicating a network-based attack with low complexity, requiring no authentication, and resulting in a partial availability impact. While not listed on the KEV catalog or Hot List, exploit code for both local and remote denial-of-service scenarios is publicly available on ExploitDB, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_information_services:5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

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

Exploit Intelligence

EPSS Score
50.37%
Probability of exploitation in next 30 days
EPSS Percentile
98.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-20989 · Jul 4, 2001
This CVE's current EPSS score of 0.5037 is in the 99th percentile among its peer group of 23,723 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

iss.net / security_center/static/6800.php
Vendor Advisory
securityfocus.com / archive/1/194919
securityfocus.com / bid/2973
ExploitPatchVendor Advisory