CVE-2026-121609

CRITICAL 10.0

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

CVSS Score

10.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-798 CWE-259
Vendor	qihoo 360
Product	whole home router m5
Published	Nov 4, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Qihoo 360 / Whole Home Router M5

4.0.17.1566

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/430446 vuldb.com: https://vuldb.com/vuln/430446/cti vuldb.com: https://vuldb.com/cve/CVE-2026-121609 vuldb.com: https://vuldb.com/submit/1023264 gist.github.com: https://gist.github.com/gajgdm6-cpu/c8c3bbdeb51c076317834b41c3a919f2

Credits

🔍 xiaomao (VulDB User) VulDB CNA Team