Huawei AR 150, 200, 1200, 2200, and 3200 routers, when SNMPv3 is enabled, allow remote attackers to cause a denial of service (device crash) via malformed SNMPv3 requests that leverage unspecified overflow issues.
http://www.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-260601.htm