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Vulnerability record · CVE-2017-7964 · published 19 April 2017

CVE-2017-7964: Zyxel wre6505 firmware insecure default initialization vulnerability

Zyxel · Wre6505 Firmware

Zyxel WRE6505 devices have a default TELNET password of 1234 for the root and admin accounts, which makes it easier for remote attackers to conduct DNS hijacking attacks by reconfiguring the built-in dnshijacker process.

10.0 CVSS 3.0 Critical EPSS 2.5% · top 16.1% CWE-1188 · Insecure default initialization
10.0CVSS 3.0 base score, v2 10.0
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Zyxel WRE6505 devices have a default TELNET password of 1234 for the root and admin accounts, which makes it easier for remote attackers to conduct DNS hijacking attacks by reconfiguring the built-in dnshijacker process.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

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

References

LinkTags
https://www.oxy-gen.mobi/blog.html ExploitPatchThird Party Advisory
https://www.oxy-gen.mobi/blog.html ExploitPatchThird Party Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2017-7964), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.