CVE-2001-1291

Exp

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.

Published: 2001-07-12 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2001-1291 is rated High Exploit Risk (83.5/100): CVSS Critical severity, with high exploitation likelihood (EPSS 7.24%, 91th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2001-1291

EDB-ID Source Kind Published Link
21011 exploit_db edb 2001-07-12 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2001-1291

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-10-10 9.89% 7.24% -2.65%
2 2025-03-30 14.42% 9.89% -4.53%
3 2025-03-29 — 14.42% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2001-1291

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2001-1291

Affected software / configurations for CVE-2001-1291

Vendor Product Version Raw CPE
3com superstack_ii_ps_hub_40_firmware — cpe:2.3:o:3com:superstack_ii_ps_hub_40_firmware:-:*:*:*:*:*:*:*

References for CVE-2001-1291

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