CVE-2026-121609: Qihoo 360 Whole Home Router M5 Boot Script mpt start hard-coded credentials
- Is it exploited?
Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.
- How likely is exploitation in the next 30 days?
- 0.5%
EPSS score, percentile 43.4 of all scored records. A probability estimated by FIRST, not a report of exploitation.
CISA's SSVC assessment in the CVE record lists exploitation as poc.
- How severe?
- 10.0 Critical
CVSS v4.0 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
No patch or vendor advisory is listed in the CVE record. Check Qihoo 360's advisories.
A public exploit is linked in the references.
- Which versions are affected?
Affected
- 4.0.17.1566
Source: CISA KEV 2026.11.10, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Qihoo 360 Whole Home Router M5 Boot Script mpt start hard-coded credentials
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.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
No patch, vendor advisory or mitigation is listed in the CVE record. Check Qihoo 360's own security advisories for a fix, and compare your version with the affected versions below.
A public exploit is linked in the references.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (1 product)
| Status | Versions |
|---|---|
| Affected | 4.0.17.1566 |
Source: CVE List, as of . About the data.
Weakness
CWE-798, CWE-259
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |