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Vulnerability record · CVE-2008-1526 · published 26 March 2008

CVE-2008-1526: Zyxel p-663hn-51 firmware vulnerability

Zyxel · P 663hn 51 Firmware

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), do not use a salt when calculating an MD5 password hash, which makes it easier for attackers to crack passwords.

7.5 CVSS 3.1 High EPSS 0.89% · top 41.5% CWE-916 · CWE-916
7.5CVSS 3.1 base score, v2 5.0
0.89%EPSS exploitation probability, 30 days
NoNot in CISA KEV
19Affected 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), do not use a salt when calculating an MD5 password hash, which makes it easier for attackers to crack passwords.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

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

References

LinkTags
http://www.gnucitizen.org/projects/router-hacking-challenge/ Broken Link
http://www.procheckup.com/Hacking_ZyXEL_Gateways.pdf Broken Link
http://www.securityfocus.com/archive/1/489009/100/0/threaded Broken LinkThird Party AdvisoryVDB Entry
http://www.gnucitizen.org/projects/router-hacking-challenge/ Broken Link
http://www.procheckup.com/Hacking_ZyXEL_Gateways.pdf Broken Link
http://www.securityfocus.com/archive/1/489009/100/0/threaded Broken LinkThird Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2008-1526), CISA KEV, FIRST EPSS (scores of 2026-10-14). This page is refreshed as NVD updates the record.