Read the docs
TI-2026-06369 Aliases CVE-2026-7255GHSA-2rgv-5m49-97j4

Missing brute-force protection in Zyxel WRE6505 v2 firmware

Priority LOW 28CWE-307Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-307.

Summary

** 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.002 9th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZyxelWRE6505 v2 firmwareV1.00(ABDV.3)C0—No fix listedCNA
  • WRE6505 v2 firmware VendorZyxel Affected V1.00(ABDV.3)C0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:zyxel:wre6505_firmware:v1.00\(abdv.3\)c0:*:*:*:*:*:*:*v1.00(abdv.3)c0VulnerableZyxel
cpe:2.3:h:zyxel:wre6505:v2:*:*:*:*:*:*:*v2Running onZyxel
  • cpe:2.3:o:zyxel:wre6505_firmware:v1.00\(abdv.3\)c0:*:*:*:*:*:*:* Versions v1.00(abdv.3)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:wre6505:v2:*:*:*:*:*:*:* Versions v2 Running on ·Zyxel

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-7255
  2. 2026-10-03 Alias added: GHSA-2rgv-5m49-97j4

References

Other 1

  • TI-2017-05567 Zyxel WRE6505 devices have a default TELNET password of 1234 for the root and admin… CVSS 3.0CRITICAL 10.0
  • TI-2026-06370 OS command injection in Zyxel WRE6505 v2 firmware CVSS 3.1HIGH 8.8
  • TI-2026-05313 Improper output encoding in Zyxel WRE6505 v2 firmware CVSS 3.1MEDIUM 5.7
  • TI-2026-06371 Insecure storage of sensitive information in Zyxel WRE6505 v2 firmware CVSS 3.1MEDIUM 4.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences