CVE-2008-1523

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2008-03-26 · updated 2026-06-16
Weakness: CWE-200

Description

ZyXEL Prestige routers, including P-660, P-661, and P-662 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), allow remote authenticated users to obtain ISP and Dynamic DNS credentials by sending a direct request for (1) WAN.html, (2) wzPPPOE.html, and (3) rpDyDNS.html, and then reading the HTML source.

Affected products

Zyxel Prestige 660: h-d1, h-d3
Zyxel Prestige 661: hw-d1
Zyxel Zynos: 3.40-agd.2, 3.40-agl.3, 3.40-ahq.0, 3.40-ahq.3, 3.40-ahz.0, 3.40-atm.0

References

http://www.gnucitizen.org/projects/router-hacking-challenge/
http://www.procheckup.com/Hacking_ZyXEL_Gateways.pdf
http://www.securityfocus.com/archive/1/489009/100/0/threaded
https://exchange.xforce.ibmcloud.com/vulnerabilities/41509
http://www.gnucitizen.org/projects/router-hacking-challenge/
http://www.procheckup.com/Hacking_ZyXEL_Gateways.pdf
http://www.securityfocus.com/archive/1/489009/100/0/threaded
https://exchange.xforce.ibmcloud.com/vulnerabilities/41509

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