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Vulnerability record · CVE-2026-7255 · published 12 May 2026

CVE-2026-7255: Zyxel wre6505 firmware improper restriction of authentication attempts vulnerability

Zyxel · Wre6505 Firmware

** UNSUPPORTED WHEN ASSIGNED ** An improper restriction of excessive authentication attempts vulnerability in the web management interface of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to brute-force the password and bypass authentication.

6.5 CVSS 3.1 Medium EPSS 0.32% · top 77.7% CWE-307 · Improper restriction of authentication attempts
6.5CVSS 3.1 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

** UNSUPPORTED WHEN ASSIGNED ** An improper restriction of excessive authentication attempts vulnerability in the web management interface of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to brute-force the password and bypass authentication.

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

Affected products

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

References

LinkTags
https://www.zyxel.com/global/en/support/end-of-life Product

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Related vulnerabilities

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

10.0CVE-2017-7964Zyxel wre6505 firmware insecure default initialization vulnerabilityZyxel WRE6505 devices have a default TELNET password of 1234 for the root and admin accounts, which makes it easier for remote attackers to conduct D…EPSS 2.5%8.8CVE-2026-7256Zyxel wre6505 firmware os command injection vulnerability** UNSUPPORTED WHEN ASSIGNED ** A command injection vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow…EPSS 2.7%5.7CVE-2026-6058Zyxel wre6505 firmware vulnerability** UNSUPPORTED WHEN ASSIGNED ** An improper encoding or escaping vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C…EPSS 0.22%4.4CVE-2026-7257Zyxel wre6505 firmware vulnerability** UNSUPPORTED WHEN ASSIGNED ** An insecure storage of sensitive information vulnerability in the configuration file of Zyxel WRE6505 v2 firmware ver…EPSS 0.15%

Source: NIST National Vulnerability Database (record CVE-2026-7255), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.