CVE-2020-25079 in DCS-2530L
Summary
by MITRE
An issue was discovered on D-Link DCS-2530L before 1.06.01 Hotfix and DCS-2670L through 2.02 devices. cgi-bin/ddns_enc.cgi allows authenticated command injection.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 05/23/2026
The vulnerability identified as CVE-2020-25079 affects D-Link network security cameras including the DCS-2530L and DCS-2670L models, representing a critical command injection flaw that compromises device integrity and operational security. This issue exists within the web interface component cgi-bin/ddns_enc.cgi which processes user inputs without proper sanitization, creating a pathway for authenticated attackers to execute arbitrary commands on the affected devices. The vulnerability specifically targets devices running firmware versions prior to 1.06.01 Hotfix for DCS-2530L and through 2.02 for DCS-2670L, indicating a widespread impact across multiple product lines within D-Link's camera portfolio.
The technical implementation of this vulnerability stems from inadequate input validation within the ddns_enc.cgi script, which processes Dynamic Domain Name System (DDNS) configuration parameters. When authenticated users submit commands through the web interface, the system fails to properly sanitize or escape special characters in the input fields, allowing attackers to inject malicious command sequences that get executed with the privileges of the web server process. This flaw aligns with CWE-77 and CWE-94 categories, representing command injection and code injection vulnerabilities respectively, where the system directly incorporates user-supplied data into executable code without proper validation or sanitization. The attack surface is particularly concerning as it requires only authenticated access, meaning that an attacker who has already compromised credentials for the device can leverage this vulnerability to escalate privileges and gain full control over the camera's functionality.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with complete control over the affected network cameras. An attacker can execute arbitrary commands to modify camera settings, access stored video feeds, disable security features, or even use the compromised device as a pivot point for attacking other systems within the network. This command injection capability allows for potential data exfiltration, service disruption, and can be leveraged to establish persistent access to the network infrastructure. The vulnerability can be exploited through the web interface, making it accessible to attackers with legitimate user credentials, and potentially enabling lateral movement within networks where these devices are deployed. This threat vector particularly affects enterprise and home security deployments where D-Link cameras are used to monitor sensitive areas, as the compromise of these devices can lead to unauthorized surveillance and privacy violations.
Mitigation strategies for CVE-2020-25079 should focus on immediate firmware updates from D-Link to address the command injection vulnerability, as well as implementing network segmentation to limit access to these devices. Organizations should enforce strict access controls and ensure that only authorized personnel have administrative credentials to camera systems. Network monitoring should be enhanced to detect unusual command execution patterns, and regular security audits should be conducted to verify that all devices are running patched firmware versions. The vulnerability also highlights the importance of secure coding practices and input validation, particularly for web-based management interfaces. According to ATT&CK framework category T1059, this vulnerability enables command and scripting interpreter techniques, while T1078 addresses legitimate credentials usage, and T1566 covers social engineering aspects when attackers exploit weak authentication mechanisms. Additional defensive measures include implementing network access controls, disabling unnecessary services, and maintaining comprehensive logging of all administrative activities on network devices. Regular vulnerability assessments and penetration testing should be conducted to identify similar weaknesses in other network infrastructure components that may provide similar attack vectors.