D-Link DI-8300 v16.07.26A1 was discovered to contain a buffer overflow via the fn parameter in the tgfile_htm function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input. The CVSS score for this vulnerability is 7.5, indicating a high severity level that necessitates immediate attention from affected organizations.
Risk to organizations includes potential downtime and loss of service availability. Since the attack vector is network-based and does not require user interaction or privileges, this vulnerability can be exploited easily by an attacker, making it critical to patch or remediate as soon as possible.
Currently, there is no public exploit confirmed for this vulnerability, and it is not included in the Known Exploited Vulnerabilities (KEV) catalog. However, given its characteristics, attackers may leverage this vulnerability to disrupt services.
Organizations should prioritize patching immediately to avoid potential service interruptions and ensure the integrity of their network environments.
Vulnerability Details
The vulnerability is classified as a buffer overflow, specifically identified as CWE-120. It affects the D-Link DI-8300 firmware version 16.07.26A1. The vulnerability was published on April 8, 2026, indicating a recent discovery that could pose significant risks if left unaddressed.
The CVSS score of 7.5 indicates high severity, with significant availability impact and low attack complexity. The lack of required privileges and user interaction further facilitates potential exploitation.
Technical Analysis
The root cause of this vulnerability lies in the insufficient validation of inputs in the tgfile_htm function, leading to a buffer overflow. Attackers can exploit this vulnerability over the network without requiring any privileges or user interaction, which greatly increases the risk of successful exploitation.
The attack complexity is considered low, meaning that attackers with minimal skills could exploit this vulnerability. The availability impact is rated as high, meaning that successful exploitation could result in a complete denial of service, rendering the affected device non-operational.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is substantial. Organizations using the D-Link DI-8300 may face significant operational interruptions if this vulnerability is exploited. The blast radius can extend across network services relying on this device, affecting availability and potentially leading to reputational damage.
Organizations should assess their exposure and implement necessary measures to mitigate this vulnerability. Given the CVSS score of 7.5 and the potential for exploitation, organizations should address this in their priority patch cycle.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The only affected version is D-Link DI-8300 firmware version 16.07.26A1. Organizations using this firmware should take immediate action to remediate this vulnerability.
Mitigation & Remediation
To mitigate this vulnerability, organizations should upgrade to the latest firmware provided by D-Link. Ensure that you are using the patched version to avoid potential exploits. If a patch is not available, consider implementing network controls such as firewalls to restrict access to the device.
Organizations should also conduct regular security assessments and penetration testing to identify and remediate vulnerabilities proactively. For further guidance, organizations may refer to the penetration testing services provided by security professionals to ensure the effectiveness of their security measures.
Detection Guidance
Organizations should monitor logs for unusual traffic patterns directed at the D-Link DI-8300. Additionally, watch for any behavioral anomalies that may indicate exploitation attempts, such as unexpected reboots or service outages.
Implementing network signatures that can detect anomalies in requests to the tgfile_htm function can also aid in early detection of exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its potential to disrupt services critical to organizations relying on D-Link devices. As organizations increasingly depend on such infrastructure, vulnerabilities of this nature highlight the need for proactive security measures.
This vulnerability represents a trend of network-exploitable vulnerabilities that can be easily leveraged by attackers. Security teams should prioritize understanding the root causes of such vulnerabilities to enhance their defenses. Lessons learned from this incident should inform the development of more resilient security architectures.
Organizations should invest in continuous security assessments and application security assessments to mitigate similar vulnerabilities in the future.
Additionally, reviewing and updating security policies and incident response plans can prepare organizations for future incidents.
Consider referencing the latest trends in vulnerability exposure and mitigation strategies in the context of IoT devices to keep security measures aligned with evolving threats. For further insights, organizations can explore our 2025 Vulnerability Exposure Severity Trends report.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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