CVE-2026-121609

Qihoo 360 Whole Home Router M5 Boot Script mpt start hard-coded credentials

Critical 10.0
A public exploit reference is listed

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.

Key facts

Published: 4 Nov 2026
Last changed: 9 Nov 2026
Assigned by: VulDB
EPSS: 0.501% likely to be exploited in the next 30 days, higher than 43.474% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: poc; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

10.0CVSS 4.0, Criticalfrom the CNA (VulDB)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
10.0CVSS 3.1, Criticalfrom the CNA (VulDB)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
10.0CVSS 3.0, Criticalfrom the CNA (VulDB)CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
10.0CVSS 2.0, Highfrom the CNA (VulDB)AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
Qihoo 360	Whole Home Router M5	4.0.17.1566 (affected)

Timeline

3 Nov 2026 Advisory disclosed
3 Nov 2026 VulDB entry created
3 Nov 2026 VulDB entry last update
4 Nov 2026 Published

Weakness

References

VDB-430446 | Qihoo 360 Whole Home Router M5 Boot Script mpt start hard-coded credentialsvdb-entrytechnical-description
VDB-430446 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
CVE-2026-121609 | CVE Analysis and Reportthird-party-advisory
Submit #1023264 | 360 (Qihoo 360) 360 Whole Home Router M5 4.0.17.1566 Use of Hard-coded Credentialsthird-party-advisory
gist.github.comexploit