A vulnerability was determined in D-Link DIR-822 A_101. The impacted element is the function system of the file /udhcpcd/dhcpd.c of the component udhcpd DHCP Service. This manipulation of the argument Hostname causes command injection. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. This vulnerability only affects products that are no longer supported by the maintainer.
The CVSS score of this vulnerability is 6.9, categorizing it as medium severity. This score indicates that the vulnerability is network-exploitable with low complexity, requiring no privileges or user interaction. Organizations should prioritize patching immediately.
Risk to organizations includes unauthorized access to network devices, potential data leaks, and the possibility of further attacks leveraging this vulnerability. Given that the exploit is publicly disclosed, the urgency for defenders to implement appropriate mitigations is high.
As this vulnerability only affects unsupported products, organizations should review their inventory and ensure that any such devices are either upgraded to a supported version or removed from the network.
Vulnerability Details
CVE-2026-7067 presents a command injection vulnerability in D-Link DIR-822 A_101's udhcpd DHCP Service, specifically in the handling of the Hostname argument. The vulnerability has been scored with a CVSS base score of 6.9, indicating medium severity. This vulnerability allows attackers to execute arbitrary commands on the device, posing significant risks to the network environment.
The vulnerability was published on April 27, 2026, and falls under CWE classifications CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')) and CWE-77 (Improper Neutralization of Special Elements used in a Command ('Command Injection')).
Technical Analysis
The root cause of this vulnerability lies in the improper handling of the Hostname argument within the udhcpd DHCP Service. Attackers may exploit this flaw to inject malicious commands into the system, initiating a command injection attack. The attack vector is network-based, with low complexity and no privileges required, making exploitation straightforward for attackers.
Given that user interaction is not required, this vulnerability can be exploited remotely, increasing the potential impact on affected systems. The confidentiality, integrity, and availability impacts are rated as low, indicating that while the risk is significant, the immediate consequences may not be catastrophic if mitigated quickly.
Risk & Impact Analysis
Organizations utilizing D-Link DIR-822 A_101 devices face substantial risks due to this vulnerability. The ability for remote attackers to execute arbitrary commands could lead to a breach of network security, unauthorized access to sensitive data, and potential lateral movement within the network.
Organizations should assess their exposure to this vulnerability and take immediate action to mitigate risks. The blast radius could extend to all devices connected to the affected D-Link router, amplifying the urgency for patching or device replacement.
Given the CVSS score and the nature of the attack, organizations should prioritize this vulnerability in their patch management cycles. Remediation is critical to prevent potential exploitation and its associated repercussions.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects the D-Link DIR-822 A_101 model and potentially other unsupported devices within the same product line. Organizations should ensure that all versions prior to vendor patch are assessed for this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching affected devices as a primary remediation strategy. If patches are unavailable, consider replacing unsupported devices with newer models that receive regular updates.
For immediate mitigation, network segmentation can help isolate vulnerable devices from critical infrastructure. Implementing strict firewall rules can also limit exposure to potential attacks.
Monitoring for unusual network traffic and login attempts is crucial to detect any attempts to exploit this vulnerability.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for indicators of exploitation attempts. Look for anomalies in DHCP requests that may indicate command injection attempts.
Behavioral anomalies in the router's operation, such as unexpected reboots or changes in configuration, may also signal exploitation.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-7067 highlights the importance of maintaining up-to-date firmware in network devices. Legacy systems are increasingly targeted due to lack of security updates, representing a growing trend in the exploitation landscape.
Security teams should learn from this vulnerability by implementing a proactive approach to device management, ensuring that all devices are regularly updated or replaced as necessary.
For further guidance on securing network devices, consider reviewing network security best practices to mitigate risks.
Additionally, organizations should consider leveraging red teaming services to uncover hidden vulnerabilities and improve overall security posture.
Finally, integrating security awareness training into your organization can help employees recognize and respond to potential threats, ensuring a more resilient security environment.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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