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Vulnerability record · CVE-2008-1527 · published 26 March 2008

CVE-2008-1527: Zyxel prestige 660 vulnerability

Zyxel · Prestige 660

ZyXEL 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 over HTTP via a hash string in the hiddenPassword field, which allows remote attackers to obtain access via a replay attack.

7.5 CVSS 2.0 High EPSS 1.4% · top 28.2% CWE-310 · CWE-310
7.5CVSS 2.0 base score
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

ZyXEL 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 over HTTP via a hash string in the hiddenPassword field, which allows remote attackers to obtain access via a replay attack.

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
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

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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-2008-1522Zyxel prestige 660 vulnerabilityZyXEL 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…EPSS 1.4%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%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-2008-1527), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.