RCE in Linksys Mr9600
CVE-2026-4558
A flaw has been found in Linksys MR9600 2.0.6.206937. Affected is the function smartConnectConfigure of the file SmartConnect.lua. Executing a manipulation of the argument configApSsid/configApPassphrase/srpLogin/srpPassword can lead to os command injection. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.078 (94.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.049 · newest: 0.078 · change: +0.029
Affected products
- Linksys Mr9600 — versions 2.0.6.206937
- Linksys Mr9600 Firmware — versions 2.0.6.206937
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/utmost3/cve/issues/1 (issue-tracking, Exploit, Third Party Advisory, exploit, Issue Tracking)
- www.linksys.com/ (Product, product)
Frequently asked questions
- What is CVE-2026-4558?
- CVE-2026-4558 is a high-severity vulnerability in Linksys Mr9600, classified under Command Injection. CVSS score: 8.8/10. Published 2026-03-22.
- How severe is CVE-2026-4558?
- High severity. CVSS v3 base score is 8.8 out of 10.