High severity · published Mar 22, 2026
CVE-2026-4558
Linksys MR9600 SmartConnect.lua smartConnectConfigure os command injection
8.8
CVSS
5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.0% · higher than 92% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MR
MR9600 · Linksys
2.0.6.206937 · source: vendor
MF
Mr9600 Firmware · Linksys
2.0.6.206937 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4558
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4558
Exploit
https://github.com/utmost3/cve/issues/1
Permissions Required
https://vuldb.com/?ctiid.352385
Third Party Advisory
https://vuldb.com/?id.352385
Third Party Advisory
https://vuldb.com/?submit.775036
Product
https://www.linksys.com/
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