Hikvision DVR DS-7204HGHI-F1 V4.0.1 build 180903 Web Version sends a different response for failed ISAPI/Security/sessionLogin/capabilities login attempts depending on whether the user account exists, which might make it easier to enumerate users. However, only about 4 or 5 failed logins are allowed.

There is a privilege escalation vulnerability in some Hikvision DVR products. Due to the improper implementation of authentication for the serial port, an attacker with physical access could exploit this vulnerability by connecting to the affected products and gaining access to an unrestricted shell environment.

There is an improper authentication vulnerability in some Hikvision DVR products. Due to the improper implementation of authentication for the serial port, an attacker with physical access could exploit this vulnerability by connecting to the affected products and run a series of commands.

Buffer overflow in Hikvision DVR DS-7204 Firmware 2.2.10 build 131009, and other models and versions, allows remote attackers to execute arbitrary code via an RTSP PLAY request with a long Authorization header.