A security vulnerability has been detected in TRENDnet TEW-821DAP 1.12B01. Impacted is the function auto_update_firmware of the component Firmware Update. The manipulation of the argument str leads to buffer overflow. The attack may be initiated remotely. The vendor explains: "That firmware version will only work on our hardware version v1.xR. We have already EOL that product 8 years ago and are no longer selling." This vulnerability only affects products that are no longer supported by the maintainer.
With a CVSS score of 8.7, this vulnerability is classified as high severity. The risk to organizations includes potential unauthorized access and system manipulation, leading to significant impacts on confidentiality, integrity, and availability.
Organizations should prioritize patching immediately. Given that the affected product is no longer supported, organizations using TRENDnet TEW-821DAP must consider alternative solutions to mitigate the risk.
As of now, no public exploit has been confirmed, but the high exploitability score indicates that this vulnerability could be leveraged by attackers. It is essential for organizations to remain vigilant and monitor their systems for any unusual activity.
Vulnerability Details
The vulnerability specifically affects the TRENDnet TEW-821DAP device, which is associated with the function responsible for firmware updates. The CVSS 4.0 vector indicates that the attack vector is network-based, with low complexity and requiring low privileges.
The official CVE description highlights that the firmware version in question has not been sold for the last eight years, indicating a lack of ongoing support and vulnerability management from the vendor.
Technical Analysis
The root cause of this vulnerability is a buffer overflow within the auto_update_firmware function, stemming from improper validation of the input argument str. This oversight allows an attacker to exploit the function remotely.
The attack vector is network-based, meaning attackers do not require physical access to the device. The attack complexity is low, and privileges required for exploitation are also low, making it accessible for exploitation.
User interaction is not required for this attack, and the potential impacts on confidentiality, integrity, and availability are high. Thus, organizations should treat this vulnerability with utmost seriousness.
Risk & Impact Analysis
The risk to organizations includes unauthorized access and potential system compromise. Given the product's end-of-life status, organizations relying on TRENDnet TEW-821DAP are at significant risk without vendor support.
The blast radius for this vulnerability could extend to any network segment where the device is connected. Organizations should assess their network architecture to identify potential exposure.
The urgency for remediation is high, given the CVSS score and the potential for exploitation. Security teams should incorporate this vulnerability into their next prioritization cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects TRENDnet TEW-821DAP firmware version 1.12B01. Since the product is no longer supported, organizations should consider alternatives.
Mitigation & Remediation
Organizations should prioritize immediate action. Since the product is out of support, upgrading to a newer, supported model is the best course of action. For those unable to upgrade, consider implementing network segmentation to limit exposure.
Additionally, organizations should enhance their monitoring capabilities to detect any unusual behavior that may indicate exploitation attempts.
Detection Guidance
Monitor logs for any indicators of exploitation attempts, such as abnormal firmware update requests or unexpected network traffic patterns. Implement behavioral anomaly detection to identify potential compromises.
AppSecure Threat Intelligence Insight
This vulnerability represents a concerning trend in the IoT space where older devices remain in use despite lack of support. Organizations must recognize the long-term risks of deploying unsupported hardware.
For further reading, organizations can explore our vulnerability management program to enhance their security posture.
Additionally, security teams should consider implementing a comprehensive penetration testing methodology to identify and remediate vulnerabilities proactively.
Finally, leveraging effective AI security best practices can further bolster defenses against such vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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