CVE-2001-1135

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2001-08-14 · updated 2026-06-16

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.

Affected products

Zyxel Prestige: 642r

References

http://www.securityfocus.com/archive/1/203022
http://www.securityfocus.com/archive/1/203592
http://www.securityfocus.com/archive/1/204439
http://www.securityfocus.com/archive/1/214971
http://www.securityfocus.com/bid/3346
https://exchange.xforce.ibmcloud.com/vulnerabilities/7146
http://www.securityfocus.com/archive/1/203022
http://www.securityfocus.com/archive/1/203592
http://www.securityfocus.com/archive/1/204439
http://www.securityfocus.com/archive/1/214971
http://www.securityfocus.com/bid/3346
https://exchange.xforce.ibmcloud.com/vulnerabilities/7146

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