CVE-2022-26258 in DIR-820L
Summary
by MITRE • 03/28/2022
D-Link DIR-820L 1.05B03 was discovered to contain remote command execution (RCE) vulnerability via HTTP POST to get set ccp.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 11/03/2025
The vulnerability identified as CVE-2022-26258 affects D-Link DIR-820L routers running firmware version 1.05B03 and potentially other affected models within the DIR-820L product line. This represents a critical security flaw that allows remote attackers to execute arbitrary commands on the affected device without authentication. The vulnerability manifests through an HTTP POST request directed to a specific endpoint designated for set ccp functionality, creating an unauthorized access vector that compromises the device's integrity and operational security.
The technical implementation of this vulnerability stems from insufficient input validation and improper sanitization within the web interface handling of the set ccp parameter. When the router processes the HTTP POST request containing malicious command input, the system fails to properly validate or escape the user-supplied data before incorporating it into system commands. This classic input validation failure creates a command injection vulnerability that falls under CWE-77 and CWE-94 categories, where attacker-controlled data is directly executed as system commands. The flaw exists in the router's web application layer and demonstrates poor secure coding practices in handling user-supplied parameters.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete system compromise and potential network infiltration. An attacker exploiting this vulnerability can gain root-level access to the router, enabling them to modify network configurations, install malware, redirect traffic, or establish persistent backdoors. The remote nature of the exploit means that attackers can target these devices from anywhere on the internet without requiring physical access or local network presence. This vulnerability directly aligns with ATT&CK technique T1059.001 for command and scripting interpreter and T1021.001 for remote services, allowing for lateral movement and persistent access within targeted networks.
Mitigation strategies for CVE-2022-26258 should prioritize immediate firmware updates from D-Link, as the vendor has likely released patches addressing this specific vulnerability. Network administrators should implement network segmentation to isolate affected devices and monitor for suspicious traffic patterns that might indicate exploitation attempts. Additional protective measures include disabling unnecessary remote management features, implementing strong authentication mechanisms, and conducting thorough network vulnerability assessments to identify other potentially affected devices. The vulnerability also underscores the importance of regular firmware updates and proper input validation in embedded systems, particularly those handling network administration functions. Organizations should consider implementing intrusion detection systems to monitor for HTTP POST requests targeting the vulnerable endpoint and establish incident response procedures for rapid containment and remediation of similar vulnerabilities.