Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability
Tenda AC7, AC9, and AC10 devices contain a command injection vulnerability due to the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input. Successful exploitation allows an attacker to execute OS commands via a crafted goform/setUsbUnload request.
A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2022-05-03 under CISA BOD 22-01.
This is a OS Command Injection (CWE-78) vulnerability in Tenda AC7, AC9, and AC10 Routers. An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7), AC9 devices with firmware through V15.03.05.19(6318)_CN(AC9), and AC10 devices with firmware through V15.03.06.23_CN(AC10). A command Injection vulnerability allows attackers to execute arbitrary OS commands via a crafted goform/setUsbUnload request. This occurs because the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input. Exploitation requires remote network access, low attack complexity, no authentication required, and no user interaction required.
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Phishing link
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Malicious file
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Server compromised
Probably yes if any of these apply:
Active exploitation documented in the wild. Threat-research write-up: https://github.com/zsjevilhex/iot/blob/master/route/tenda/tenda-01/Tenda.md
Manual remediation steps
Apply the Vendor Patch
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.
CISA required action: Apply updates per vendor instructions.
References
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References