CVE-2026-7255 — The Web Management Interface Of Zyxel WRE6505 Vulnerability

CVE-2026-7255 — The Web Management Interface Of Zyxel WRE6505 Vulnerability

CVE-2026-7255 — ** 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 authentic

What This Means For You

  • If your environment is affected by CWE-307, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-7255 updates and patches.

Related ATT&CK Techniques

🛡️ Detection Rules

2 rules · 6 SIEM formats

2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.

high T1110 Credential Access

CVE-2026-7255 - Zyxel WRE6505 Web Management Brute Force Attempts

Sigma YAML — free preview
title: CVE-2026-7255 - Zyxel WRE6505 Web Management Brute Force Attempts
id: scw-2026-05-12-ai-1
status: experimental
level: high
description: |
  Detects multiple failed authentication attempts (HTTP 401 or 403 status codes) originating from an adjacent network IP address (assuming a common LAN subnet) targeting the Zyxel WRE6505 web management interface. This is indicative of an attacker attempting to brute-force credentials as described in CVE-2026-7255.
author: SCW Feed Engine (AI-generated)
date: 2026-05-12
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-7255/
tags:
  - attack.credential_access
  - attack.t1110
logsource:
    category: authentication
detection:
  selection:
      src_ip:
          - '192.168.1.0/24' 
      sc-status:
          - '401'
          - '403'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse

✓ Sigma · Splunk SPL Sentinel KQL Elastic QRadar AQL Wazuh Get rules for your SIEM →

Indicators of Compromise

IDTypeIndicator
CVE-2026-7255 vulnerability CVE-2026-7255
CWE-307 weakness CWE-307
Source & Attribution
Source PlatformNVD
ChannelNational Vulnerability Database
PublishedMay 12, 2026 at 07:16 UTC

This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.

Believe this infringes your rights? Submit a takedown request.

Related coverage

CVE-2026-41872: Kura Sushi App Vulnerable to MITM via Improper Certificate Validation

CVE-2026-41872 — "Kura Sushi Official App" provided by EPG, Inc. is vulnerable to improper certificate validation. A man-in-the-middle attack may allow eavesdropping on, or altering,...

vulnerabilityCVEhigh-severitycwe-295
/SCW Vulnerability Desk /HIGH /7.4 /⚑ 2 IOCs /⚙ 3 Sigma

Zyxel NWA1100-N Firmware DoS: CVE-2026-7287 Buffer Overflow

CVE-2026-7287 — ** UNSUPPORTED WHEN ASSIGNED ** A buffer overflow vulnerability in the formWep(), formWlAc(), formPasswordSetup(), formUpgradeCert(), and formDelcert() functions of the “webs” binary in...

vulnerabilityCVEhigh-severitybuffer-overflowcwe-120
/SCW Vulnerability Desk /HIGH /7.5 /⚑ 3 IOCs /⚙ 4 Sigma

CVE-2026-7257 — The Configuration File Of Zyxel WRE6505 Vulnerability

CVE-2026-7257 — ** UNSUPPORTED WHEN ASSIGNED ** An insecure storage of sensitive information vulnerability in the configuration file of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0...

vulnerabilityCVEmedium-severitycwe-922
/SCW Vulnerability Desk /MEDIUM /4.4 /⚑ 2 IOCs /⚙ 3 Sigma