Format string vulnerability in Huawei AR100, AR120, AR150, AR200, AR500, AR550, AR1200, AR2200, AR2500, AR3200, and AR3600 routers with software before V200R007C00SPC900 and NetEngine 16EX routers with software before V200R007C00SPC900 allows remote authenticated users to cause a denial of service via format string specifiers in vectors involving partial commands.