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TI-2026-03963 Aliases CVE-2026-4558GHSA-c659-rvfg-wgf8

Linksys MR9600 SmartConnect.lua smartConnectConfigure os command injection

Priority HIGH 73CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.04979 92nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinksysMR96002.0.6.206937—No fix listedCNA
  • MR9600 VendorLinksys Affected 2.0.6.206937 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linksys:mr9600_firmware:2.0.6.206937:*:*:*:*:*:*:*2.0.6.206937VulnerableLinksys
cpe:2.3:h:linksys:mr9600:-:*:*:*:*:*:*:*not specified by NVDRunning onLinksys
  • cpe:2.3:o:linksys:mr9600_firmware:2.0.6.206937:*:*:*:*:*:*:* Versions 2.0.6.206937 Vulnerable ·Linksys
  • cpe:2.3:h:linksys:mr9600:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linksys

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-4558
  2. 2026-10-03 Alias added: GHSA-c659-rvfg-wgf8

References

Exploit 1

Other 1

  • TI-2026-06120 Linksys MR9600 JNAP Action run_central2.sh BTRequestGetSmartConnectStatus os command injection CVSS 4.0HIGH 8.6
  • TI-2026-20710 Path Traversal vulnerability in Linksys MR9600, Linksys MX4200 CVSS 3.1MEDIUM 6.6
  • TI-2022-08249 Linksys MR9600 devices before 2.0.5 allow attackers to read arbitrary files via a… CVSS 3.1MEDIUM 4.6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences