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CVE-2026-121609

10, critical

A vulnerability was identified in Qihoo 360 Whole Home Router M5 4.0.17.1566

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
10, critical critical CVSS v3.1
EPSS, next 30 days
n/a
Exploitation
No public evidence
Published
4 Nov 2026today

Description

A vulnerability was identified in Qihoo 360 Whole Home Router M5 4.0.17.1566. This issue affects the function Home of the file /etc/init.d/mpt of the component Boot Script. The manipulation leads to hard-coded credentials. Remote exploitation of the attack is possible. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

Details

Vendor
Qihoo 360
Product
Whole Home Router M5
Weakness
CWE-259 (opens in a new tab)
Status
Deferred
Updated
4 Nov 2026
Assigner
cna@vuldb.com

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

References 5

Other references 5

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Qihoo 360 CVEs

Every Qihoo 360 CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-121606 A vulnerability has been found in Qihoo 360 D621-2, D603-2, D600-2, D619, D606-6 and D706 up to 6.4.9 10, critical
  • CVE-2026-121607 Qihoo 360 D603-2 Command Injection Vulnerability 10, critical
  • CVE-2026-121608 Qihoo 360 D603-2 Command Injection Vulnerability 7.3, high

Beyond this page

Is CVE-2026-121609 in your network?

This page tells you how dangerous CVE-2026-121609 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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    Detect it if it's exploited

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 4 Nov 2026, not the live upstream state.