CVE-2001-1291

Name: CVE-2001-1291
Creator: NVD / NIST
Published: 2001-07-12T04:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 8.90%

Last modified Jun 16, 2026

CVE-2001-1291 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The telnet server for 3Com hardware such as PS40 SuperStack II does not delay or disconnect remote attackers who provide an incorrect username or password, which makes it easier to break into the server via brute force password guessing.. EPSS estimates a 8.90% chance of exploitation in the next 30 days.

Description

The telnet server for 3Com hardware such as PS40 SuperStack II does not delay or disconnect remote attackers who provide an incorrect username or password, which makes it easier to break into the server via brute force password guessing.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

8.90%

94.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-307

Affected Software

Vendor	Product	Versions
3com	Superstack Ii Ps Hub 40 Firmware	All versions

References

http://www.securityfocus.com/archive/1/196957Broken Link, Third Party Advisory, VDB Entry, Vendor Advisory
http://www.securityfocus.com/bid/3034Broken Link, Exploit, Third Party Advisory, VDB Entry, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6855Third Party Advisory, VDB Entry
http://www.securityfocus.com/archive/1/196957Broken Link, Third Party Advisory, VDB Entry, Vendor Advisory
http://www.securityfocus.com/bid/3034Broken Link, Exploit, Third Party Advisory, VDB Entry, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6855Third Party Advisory, VDB Entry

Timeline

Published: Jul 12, 2001
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2001-1291?

How severe is CVE-2001-1291?

CVE-2001-1291 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 8.90% probability of exploitation in the next 30 days.

How do I fix CVE-2001-1291?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2001-1291?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST