Overview
A high-severity vulnerability, identified as CVE-2025-13549, has been discovered in the D-Link DIR-822K router, version 1.00. This vulnerability is a buffer overflow that can be exploited remotely, potentially allowing attackers to gain control of the affected device. The exploit is publicly available, making it crucial for users to take immediate action.
Technical Details
The vulnerability lies within the sub_455524 function of the /boafrm/formNtp file. It is triggered by manipulating the submit-url argument. By providing an overly long input for this argument, an attacker can cause a buffer overflow, potentially overwriting critical memory regions and executing arbitrary code on the router.
CVSS Analysis
This vulnerability has been assigned a CVSS score of 8.8, indicating a high level of severity. This score reflects the ease of remote exploitation and the potential impact on the confidentiality, integrity, and availability of the device and network.
Possible Impact
Successful exploitation of this vulnerability could lead to:
- Remote code execution on the router.
- Full control of the compromised device by the attacker.
- Network compromise, allowing the attacker to access other devices on the network.
- Denial of service, rendering the router unusable.
- Data theft and manipulation.
Mitigation and Patch Steps
Currently, the best course of action is to check the D-Link support site for firmware updates. Follow these general security best practices:
- Check for Firmware Updates: Regularly check the D-Link website for available firmware updates for your DIR-822K router. Apply any available patches or updates immediately.
- Disable Remote Management: If possible, disable remote management features on your router.
- Use Strong Passwords: Ensure you are using a strong, unique password for your router’s administrative interface.
- Monitor Network Traffic: Monitor your network traffic for any unusual activity.
- Consider Router Replacement: If D-Link does not release a patch, consider replacing the router with a more secure model.
