EUVD-2025-19643

Comprehensive Technical Analysis of EUVD-2025-19643

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability EUVD-2025-19643 pertains to an OS command injection flaw in AVTECH DVR, NVR, and IP camera devices. The adcommand.cgi endpoint, which interfaces with the ActionD daemon, allows authenticated users to invoke the DoShellCmd operation. This operation passes arbitrary input via the strCmd parameter, which is executed directly by the system shell without proper sanitation. This allows attackers to execute commands as the root user.

Severity Evaluation:

• Base Score: 9.4
• Base Score Version: 4.0
• Base Score Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

The high base score indicates a critical vulnerability. The attack vector is network-based (AV:N), requiring low complexity (AC:L) and no user interaction (UI:N). The attacker needs low privileges (PR:L) to exploit the vulnerability, but the impact on confidentiality, integrity, and availability is high (VC:H, VI:H, VA:H). The scope change (SC:H) and the impact on security requirements (SI:H, SA:H) are also high.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attack: An attacker can exploit this vulnerability over the network, making it accessible from remote locations.
• Authenticated Access: The attacker needs to be authenticated, which can be achieved through brute-forcing credentials or exploiting other vulnerabilities to gain access.

Exploitation Methods:

• Command Injection: By sending specially crafted input to the strCmd parameter, an attacker can execute arbitrary commands on the device.
• Privilege Escalation: Since the commands are executed as the root user, the attacker can gain full control over the device.
• Data Exfiltration: The attacker can exfiltrate sensitive data stored on the device.
• Persistent Access: The attacker can install backdoors or other malicious software to maintain persistent access.

3. Affected Systems and Software Versions

The vulnerability affects a wide range of AVTECH DVR, NVR, and IP camera devices. The affected product versions include but are not limited to:

• 1022L-1004L-1011L-1006L
• 1014-1007-1009-1001
• 1021r-1004r-1009r-1007r
• 1021-1003-1008-1003
• 1004-1000-1000-1000
• 1005-1002-1004-1001
• 1019-1003-1008-1001
• 1028-1007-1014-1012
• 1011-1005-1008-1002
• 1018-1008-1012-1004
• 1001-1000-1000-1000
• 1027-1008-1012-1008
• 1013-1002-1006-1005
• 1020-1003-1010-1006
• 1027-1014-1015-1009
• 1015-1006-1008-1007
• 1015-1006-1008-1002
• 1004-1001-1002-1000
• 1014-1004-1008-1008
• 1012-1004-1008-1008
• 1005-1002-1001-1002
• 1020-1003-1008-1004
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000
• 1002-1000-1000-1000