If you have a domestic-grade router you should check by reference to this report, whether or not it may be affected by a recently notified vulnerability https://www.sec-consult.com/fxdata/seccons/prod/temedia/advisories_txt/20150519-0_KCodes_NetUSB_Kernel_Stack_Buffer_Overflow_v10.txt

If you believe this may be the case you should contact the manufacturer direct or check their web-site to see if your model has been patched and proceed accordingly.