CVE-2001-1135

critical

Description

ZyXEL Prestige 642R and 642R-I routers do not filter the routers' Telnet and FTP ports on the external WAN interface from inside access, allowing someone on an internal computer to reconfigure the router, if the password is known.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/7146

http://www.securityfocus.com/bid/3346

http://www.securityfocus.com/archive/1/214971

http://www.securityfocus.com/archive/1/204439

http://www.securityfocus.com/archive/1/203592

http://www.securityfocus.com/archive/1/203022

Details

Source: Mitre, NVD

Published: 2001-08-14

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.00743

Detections

Analytics