CVE-2021-27707

Name of the Vulnerable Software and Affected Versions: Tenda G1 and G3 routers version v15.11.0.17(9502) CN

Description: The issue allows remote attackers to execute arbitrary code via a crafted action/"portMappingIndex" request. This occurs because the formDelPortMapping function directly passes the parameter portMappingIndex to strcpy without limit.

Recommendations: For Tenda G1 and G3 routers version v15.11.0.17(9502) CN, as a temporary workaround, consider restricting access to the formDelPortMapping function until a patch is available. Avoid using the parameter portMappingIndex in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.