Overview
A high-severity vulnerability, identified as CVE-2025-13547, has been discovered in D-Link DIR-822K and DWR-M920 routers. This flaw allows a remote attacker to cause memory corruption, potentially leading to denial of service or even arbitrary code execution. The vulnerability resides within the handling of the ‘submit-url’ argument in the ‘/boafrm/formDdns’ file.
Technical Details
CVE-2025-13547 is a memory corruption vulnerability affecting D-Link DIR-822K and DWR-M920 routers, specifically firmware versions 1.00_20250513164613 for DIR-822K and 1.1.50 for DWR-M920. The vulnerability is triggered through the manipulation of the ‘submit-url’ argument in the ‘/boafrm/formDdns’ file. An attacker can remotely exploit this flaw by crafting a malicious request with a specially crafted ‘submit-url’, leading to memory corruption on the device.
The publicly available exploit code makes this vulnerability particularly dangerous, as attackers can easily leverage it to compromise vulnerable devices. The complexity of exploiting the vulnerability is considered low due to the availability of exploit code.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) provides a standardized way to assess the severity of security vulnerabilities. CVE-2025-13547 has been assigned a CVSS score of 8.8, indicating a HIGH severity. The breakdown is as follows:
- CVSS Score: 8.8
- Vector: (Details not provided by default, derive from CVSS calculator once available.)
Possible Impact
Successful exploitation of CVE-2025-13547 could have significant consequences:
- Denial of Service (DoS): The most likely outcome is a denial-of-service attack, rendering the router unusable and disrupting network connectivity.
- Arbitrary Code Execution: In a more severe scenario, an attacker could potentially execute arbitrary code on the router, gaining full control of the device. This could allow them to intercept network traffic, modify router settings, or use the router as a launchpad for further attacks.
- Data Breach: Compromised routers can be used to collect and exfiltrate sensitive data passing through the network.
Mitigation and Patch Steps
To protect against CVE-2025-13547, users of D-Link DIR-822K and DWR-M920 routers are strongly advised to take the following steps:
- Check Firmware Version: Verify the current firmware version of your router. If you are running version 1.00_20250513164613 (DIR-822K) or 1.1.50 (DWR-M920), you are vulnerable.
- Apply Firmware Update: Visit the D-Link website and download the latest firmware version for your router model. Follow the instructions provided by D-Link to update the firmware. This is the most critical step.
- Disable Remote Management: As a temporary measure, disable remote management access to your router. This will prevent attackers from exploiting the vulnerability from outside your local network. This option is usually found in the router’s administration interface.
- Strong Password: Ensure you have a strong and unique password for your router’s administrative interface.
- Monitor Network Traffic: Keep an eye on your network traffic for any unusual activity.
