Tenda A21 Router Allows Remote Code Execution

Summary

A security flaw in the Tenda A21 router's scheduling feature can be exploited by an attacker to execute malicious code remotely. This could potentially allow an attacker to take control of the router. Update the router's software to fix the issue.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions	Fix available
tenda	a21_firmware	1.0.0.0	–

Original title

A vulnerability was detected in Tenda A21 1.0.0.0. This issue affects the function setSchedWifi of the file /goform/openSchedWifi. Performing a manipulation of the argument schedStartTime/schedEndT...

Original description

A vulnerability was detected in Tenda A21 1.0.0.0. This issue affects the function setSchedWifi of the file /goform/openSchedWifi. Performing a manipulation of the argument schedStartTime/schedEndTime results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used.

nvd CVSS2.0 9.0

nvd CVSS3.1 8.8

nvd CVSS4.0 7.4

Vulnerability type

CWE-119 Buffer Overflow

CWE-121 Stack-based Buffer Overflow

https://github.com/QIU-DIE/cve-nneeww/issues/4 Exploit Issue Tracking Mitigation Third Party Advisory
https://vuldb.com/?ctiid.347110 Permissions Required VDB Entry
https://vuldb.com/?id.347110 Third Party Advisory VDB Entry
https://vuldb.com/?submit.754635 Third Party Advisory VDB Entry
https://www.tenda.com.cn/ Product