Answer in brief
CVE-2026-121609 records a Critical severity (CVSS 10.0) vulnerability in Qihoo 360 Whole Home Router M5 Boot Script mpt start hard-coded credentials. The current sources do not mark it as known exploited. The current feed maps Qihoo 360/Whole Home Router M5 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 10.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Qihoo 360/Whole Home Router M5 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Qihoo 360/Whole Home Router M5generic | 4.0.17.1566 | Not reported |
Published upstream
Nov 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.