CVE-2026-4558

Name: CVE-2026-4558
Creator: NVD / NIST
Published: 2026-03-22T18:16:06.023+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 3.63%

Last modified Jun 17, 2026

CVE-2026-4558 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A flaw has been found in Linksys MR9600 2.0.6.206937. Affected is the function smartConnectConfigure of the file SmartConnect.lua. EPSS estimates a 3.63% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

7.4/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

3.63%

88.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linksys	Mr9600 Firmware	2.0.6.206937

References

https://github.com/utmost3/cve/issues/1Exploit, Issue Tracking, Third Party Advisory
https://vuldb.com/?ctiid.352385Permissions Required, VDB Entry
https://vuldb.com/?id.352385Third Party Advisory, VDB Entry
https://vuldb.com/?submit.775036Third Party Advisory, VDB Entry
https://www.linksys.com/Product

Timeline

Published: Mar 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4558?

How severe is CVE-2026-4558?

CVE-2026-4558 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 3.63% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4558?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4558?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST