CVE-2025-52222 D-Link CVE debrief

Who should care

Network administrators and security teams responsible for managing D-Link devices, including DI-8003, DI-8500, DI-8003G, DI-8200G, DI-8200, DI-8400, DI-8004w, DI-8100, and DI-8100G, should be aware of this vulnerability and take immediate action to mitigate the risk. They should verify the affected products in their environment, review the official advisory for mitigation guidance, and implement compensating controls such as network segmentation and access controls.

Technical summary

The CVE-2025-52222 vulnerability is a buffer overflow issue in the radius_asp function of various D-Link devices, including DI-8003, DI-8500, DI-8003G, DI-8200G, DI-8200, DI-8400, DI-8004w, DI-8100, and DI-8100G. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. The attack vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating that the vulnerability can be exploited remotely with low attack complexity and no privileges required. This allows attackers to cause a Denial of Service (DoS) via a crafted request. Network administrators and security teams should verify the affected products in their environment and review the official advisory for mitigation guidance.

Defensive priority

High priority should be given to patching or mitigating this vulnerability, as it can be exploited to cause a Denial of Service (DoS). Network administrators and security teams should verify the affected products in their environment and review the official advisory for mitigation guidance. Compensating controls, such as network segmentation and access controls, should be implemented to minimize the risk of exploitation. Monitoring network traffic for suspicious activity and conducting regular vulnerability assessments and penetration testing are also recommended. Consider implementing a web application firewall (WAF) to detect and prevent attacks. Additionally, review relevant monitoring, detection, and logs for exposed assets that need extra review. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Review compensating controls for exposed systems while remediation is scheduled and verified. Check relevant monitoring, detection, and logs for exposed assets that need extra review. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Review compensating controls for exposed systems while remediation is scheduled and verified. Check relevant monitoring, detection, and logs for exposed assets that need extra review. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Plan vendor- -

Recommended defensive actions

• Apply patches or updates provided by D-Link to vulnerable devices
• Implement compensating controls, such as network segmentation and access controls
• Monitor network traffic for suspicious activity
• Conduct regular vulnerability assessments and penetration testing
• Consider implementing a web application firewall (WAF) to detect and prevent attacks

Evidence notes

The CVE record was published on 2026-04-08T18:24:51.373Z and last modified on 2026-07-25T10:10:00.167Z. The NVD entry is currently Analyzed. This vulnerability affects various D-Link devices, including DI-8003, DI-8500, DI-8003G, DI-8200G, DI-8200, DI-8400, DI-8004w, DI-8100, and DI-8100G. The vulnerability exists in the radius_asp function and can be exploited via the rd_en, rd_auth, rd_acct, http_hadmin, http_hadminpwd, rd_key, and rd_ip parameters. Network administrators and security teams should verify the affected products in their environment and review the official advisory for mitigation guidance.

Official resources