Huawei Eudemon8000E firewall with software V200R001C01SPC800 and earlier versions allows users to log in to the device using Telnet or SSH. When an attacker sends to the device a mass of TCP packets with special structure, the logging process becomes slow and users may be unable to log in to the device.

The Huawei NE5000E, MA5200G, NE40E, NE80E, ATN, NE40, NE80, NE20E-X6, NE20, ME60, CX600, CX200, CX300, ACU, WLAN AC 6605, S9300, S7700, S2300, S3300, S5300, S3300HI, S5300HI, S5306, S6300, S2700, S3700, S5700, S6700, AR G3, H3C AR(OEM IN), AR 19, AR 29, AR 49, Eudemon100E, Eudemon200, Eudemon300, Eudemon500, Eudemon1000, Eudemon1000E-U/USG5300, Eudemon1000E-X/USG5500, Eudemon8080E/USG9300, Eudemon8160E/USG9300, Eudemon8000E-X/USG9500, E200E-C/USG2200, E200E-X3/USG2200, E200E-X5/USG2200, E200E-X7/USG2200, E200E-C/USG5100, E200E-X3/USG5100, E200E-X5/USG5100, E200E-X7/USG5100, E200E-B/USG2100, E200E-X1/USG2100, E200E-X2/USG2100, SVN5300, SVN2000, SVN5000, SVN3000, NIP100, NIP200, NIP1000, NIP2100, NIP2200, and NIP5100 use the DES algorithm for stored passwords, which makes it easier for context-dependent attackers to obtain cleartext passwords via a brute-force attack.