Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS
CVE-2026-120276 Overview
A weakness has been identified in WAVLINK WN536AX6-A V260507_2.0.0. This vulnerability affects the function sub_416760 of the file /bin/ioos of the component Web Management Interface. This manipulation of the argument group_name causes os command injection. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.
Critical Impact
Affected Products
- WAVLINK WN536AX6-A: see the vendor advisory for the exact affected versions
Discovery Timeline
- 2026-11-02: CVE-2026-120276 published to the National Vulnerability Database by cna@vuldb.com
- 2026-11-02: last updated in the NVD database
Technical Details for CVE-2026-120276
Vulnerability Analysis
CVE-2026-120276 is a Command Injection weakness (CWE-77: Command Injection, CWE-78: OS Command Injection) in WAVLINK WN536AX6-A. Based on its CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Untrusted input ends up inside a system command.
With a CVSS base score of 9.3, apply the vendor fix and confirm exposure on internet facing and business critical assets first.
Root Cause
The weakness is classified as CWE-77: Command Injection, CWE-78: OS Command Injection. Untrusted input ends up inside a system command.
Attack Vector
Based on the CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Attack complexity is low complexity.
No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
Detection Methods for CVE-2026-120276
Detection Strategies
- Inventory every instance of WAVLINK WN536AX6-A and compare the running version with the affected range above.
- Check external attack surface scans for internet facing instances of the component.
- Run an authenticated vulnerability scan once your scanner ships a check for this CVE.
Monitoring Recommendations
- Forward WAVLINK WN536AX6-A application, access and audit logs to your SIEM for retrospective hunting.
- Alert on new processes, configuration changes or outbound connections from the affected service.
- Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.
How to Mitigate CVE-2026-120276
Immediate Actions Required
- Apply the fixed version of WAVLINK WN536AX6-A named in the vendor advisory.
- Prioritize internet facing and business critical instances first.
- Rescan after the change to confirm the exposure is closed.
Patch Information
Use the fixed version listed in the vendor advisory for WAVLINK WN536AX6-A.
Workarounds
- If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.
CWE References
- CWE-77: Command Injection More CVEs with this weakness
- CWE-78: OS Command Injection More CVEs with this weakness
Technical References
This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.
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