D-Link DIR-853 A1 firmware version 1.20B07 contains a critical stack-based buffer overflow vulnerability via the Password parameter in the SetWanSettings module. This vulnerability allows attackers to exploit the firmware over the network, potentially leading to unauthorized access and control of the device. With a CVSS score of 9.8, this vulnerability is classified as critical, emphasizing the urgency for organizations to address it immediately.
The risk to organizations includes significant impacts on confidentiality, integrity, and availability due to the nature of the vulnerability. Attackers may leverage this flaw to execute arbitrary code or cause a denial of service, significantly affecting network operations and security.
Currently, there are no known exploits publicly available for this vulnerability, but the critical severity indicates that it is a high-priority issue for defenders. Organizations should prioritize patching immediately to mitigate potential threats.
Given the exploitability of this vulnerability and its potential impacts, it is crucial for affected organizations to implement necessary remediation strategies as part of their security posture.
Vulnerability Details
The vulnerability in question is a stack-based buffer overflow in D-Link DIR-853 A1 firmware version 1.20B07. The official description states that it allows remote attackers to exploit the Password parameter in the SetWanSettings module. With a CVSS score of 9.8, this vulnerability is categorized as critical, presenting a significant threat to network security.
The vulnerability type is classified under CWE-787, indicating a flaw in buffer management which can lead to overflow conditions. The publication date for this CVE was February 12, 2025, and it has been marked as modified since its initial disclosure.
Technical Analysis
The root cause of this vulnerability stems from improper handling of input data within the SetWanSettings module, particularly in the Password parameter. The attack vector is network-based, allowing attackers to exploit the flaw without physical access to the device. The complexity of the attack is low, and no privileges or user interaction are required to exploit this vulnerability.
Exploitation could lead to high impacts on confidentiality, integrity, and availability. The high confidentiality impact indicates that sensitive information may be exposed, while integrity and availability impacts suggest the potential for unauthorized modifications and denial of service conditions.
Risk & Impact Analysis
The real-world deployment risk is significant, particularly for organizations using D-Link DIR-853 devices in critical network infrastructure. The potential blast radius includes all users and services relying on affected devices, which could lead to widespread disruption.
Given the CVSS score of 9.8, this vulnerability falls into a category that demands immediate attention. Organizations should assess their exposure and apply patches in their priority patch cycle to mitigate risks effectively.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected product is D-Link DIR-853 firmware version 1.20B07. Organizations should assume that all versions prior to the vendor patch are vulnerable.
Mitigation & Remediation
Organizations are advised to check for firmware updates from D-Link and apply the latest patches to address this vulnerability. In the absence of a patch, network segmentation and robust configurations can help mitigate potential risks. Additionally, continuous security testing can identify vulnerabilities before they are exploited.
For further insights into effective remediation strategies, organizations should consider engaging in penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for unusual access attempts to the SetWanSettings module and analyze behavioral anomalies that may indicate exploitation attempts. Network signatures that detect abnormal traffic patterns can also be useful in identifying potential attacks.
AppSecure Threat Intelligence Insight
The emergence of this vulnerability highlights ongoing challenges in securing consumer devices. Security teams should take this as a reminder of the importance of proactive vulnerability management and the need for regular assessments.
For further reading on vulnerability management programs, organizations can explore the vulnerability management program design and best practices for penetration testing by reviewing our penetration testing methodology. Investing in these areas can significantly enhance security posture against vulnerabilities like CVE-2025-25746.
Additionally, organizations should remain vigilant and keep abreast of trends in vulnerability exposure and threat landscapes to prepare for future risks.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)