A buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of parameters in the /user_group.asp endpoint. Attackers may leverage this vulnerability by sending a crafted HTTP GET request with parameters name, mem, pri, and attr. The severity level is high, with a CVSS score of 7.5. This vulnerability poses a significant risk to organizations, particularly due to its potential for remote exploitation.
Risk to organizations includes potential disruption of service, as the availability impact is rated high. The vulnerability's attack vector is classified as network-based, and it requires no privileges or user interaction to exploit. Given the ease of exploitation, organizations should prioritize patching immediately.
The vulnerability was published on April 8, 2026, and remains a concern for users of the affected D-Link DI-8003 firmware. Organizations using this product need to be aware of the potential for exploitation and should take necessary actions to secure their systems against this risk.
This vulnerability is categorized under CWE-121, indicating a buffer overflow issue. With no confirmed public exploits reported to date, the urgency for remediation remains critical to prevent any potential future exploits.
Vulnerability Details
The official CVE description states that a buffer overflow vulnerability exists in D-Link DI-8003 16.07.26A1 due to improper handling of parameters in the /user_group.asp endpoint. The attacker can exploit this vulnerability by sending a crafted HTTP GET request with parameters name, mem, pri, and attr.
The CVSS score for this vulnerability is 7.5, which is classified as high severity. The vulnerability affects the D-Link DI-8003 firmware, specifically version 16.07.26A1. The publication date of this vulnerability was April 8, 2026. The corresponding CWE classification is CWE-121.
Technical Analysis
The root cause of this vulnerability is improper handling of parameters that leads to a buffer overflow. The attack vector is network-based, allowing an attacker to exploit the vulnerability remotely. The attack complexity is low, as it does not require any special conditions or privileges. No user interaction is required, making it easier for potential attackers to exploit the vulnerability.
In terms of impact, the confidentiality and integrity impacts are rated as none, while the availability impact is rated high. This means that while the attacker cannot access sensitive information or alter data, they can cause a denial of service by crashing the affected system.
Risk & Impact Analysis
Organizations that deploy the D-Link DI-8003 firmware face real-world risks due to this vulnerability. Given its high availability impact, a successful attack could disrupt services significantly. The urgency of addressing this vulnerability is underscored by its high CVSS score, indicating that organizations should address it in their priority patch cycle.
The blast radius potential is concerning, as an attacker can exploit this vulnerability across any network that utilizes the affected firmware version. Given the ease of exploitation and the lack of required privileges, organizations should prioritize remediation efforts.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected product is D-Link DI-8003 firmware version 16.07.26A1. Organizations using this firmware version should take immediate steps to apply the necessary patches. If version information is missing, organizations should assume that all versions prior to vendor patch are affected.
Mitigation & Remediation
Organizations must apply the latest patches released by D-Link to mitigate this vulnerability. For details on how to obtain the patch, organizations can refer to the D-Link Security Bulletin. In cases where the patch is unavailable, organizations should consider implementing configuration hardening measures, such as limiting access to the affected endpoint and monitoring logs for unusual activities.
Detection Guidance
Organizations should monitor logs for indicators of exploitation attempts, specifically looking for unusual HTTP GET requests to the /user_group.asp endpoint with suspicious parameters. Behavioral anomalies, such as unexpected service disruptions, should also be flagged for further investigation.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its potential to disrupt critical services, especially in IoT environments. Security teams should take this opportunity to review their overall security posture and address any weaknesses. For more information on vulnerability management, organizations can refer to our vulnerability management program and consider ongoing security assessments, such as penetration testing, to ensure robust defenses against future vulnerabilities.
As the threat landscape continues to evolve, organizations must remain vigilant and proactive in their approach to security. The lessons learned from this incident can help inform future strategies to enhance security measures across all deployments.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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