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Vulnerability record · CVE-2008-1522 · published 26 March 2008

CVE-2008-1522: Zyxel prestige 660 vulnerability

Zyxel · Prestige 660

ZyXEL Prestige routers, including P-660 and P-661 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), have (1) "user" as their default password for the "user" account and (2) "1234" as their default password for the "admin" account, which makes it easier for remote attackers to obtain access.

7.5 CVSS 2.0 High EPSS 1.4% · top 29.4% CWE-16 · CWE-16
7.5CVSS 2.0 base score
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

ZyXEL Prestige routers, including P-660 and P-661 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), have (1) "user" as their default password for the "user" account and (2) "1234" as their default password for the "admin" account, which makes it easier for remote attackers to obtain access.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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/41508
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/41508

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2007-1586Zyxel zynos vulnerabilityZynOS 3.40 allows remote attackers to cause a denial of service (link restart) by sending a request for the name \M via the SMB Mail Slot Protocol.EPSS 3.1%7.5CVE-2008-1524Zyxel prestige 660 vulnerabilityThe SNMP service on ZyXEL Prestige routers, including P-660 and P-661 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), has "public" as its defau…EPSS 1.3%7.5CVE-2008-1527Zyxel prestige 660 vulnerabilityZyXEL Prestige routers, including P-660, P-661, and P-662 models with firmware 3.40(PE9) and 3.40(AGD.2) through 3.40(AHQ.3), support authentication …EPSS 1.4%6.5CVE-2008-1521Zyxel prestige 660 permissions and access controls vulnerabilityZyXEL Prestige routers, including P-660 and P-661 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), allow remote authenticated users to gain priv…EPSS 1.1%5.0CVE-2008-1523Zyxel prestige 660 information exposure vulnerabilityZyXEL 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 o…EPSS 1.2%5.0CVE-2008-1525Zyxel prestige 660 vulnerabilityThe default SNMP configuration on ZyXEL Prestige routers, including P-660 and P-661 models with firmware 3.40(AGD.2) through 3.40(AHQ.3), has a Trust…EPSS 1.2%5.0CVE-2008-1529Zyxel prestige 660 vulnerabilityZyXEL Prestige routers have a minimum password length for the admin account that is too small, which makes it easier for remote attackers to guess pa…EPSS 1.2%5.0CVE-2004-1540Zyxel prestige vulnerabilityZyXEL Prestige 623, 650, and 652 HW Routers, and possibly other versions, with HTTP Remote Administration enabled, does not require a password to acc…EPSS 6.6%

Source: NIST National Vulnerability Database (record CVE-2008-1522), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.