CVE-2026-6014 D-Link CVE debrief

Who should care

Network administrators and security teams responsible for managing and securing D-Link DIR-513 devices should be aware of this vulnerability and assess their exposure to potential remote attacks.

Why it matters

CVE-2026-6014 is a buffer overflow vulnerability in the D-Link DIR-513 router that can be exploited remotely. Defenders should verify if affected devices are still in use and assess exposure to potential attacks. The vulnerability has a CVSS score of 7.4 and is classified as HIGH severity.

• Verify if D-Link DIR-513 devices are still in use and assess exposure to remote attacks
• Consider replacing unsupported devices to prevent potential exploitation

Technical summary

The vulnerability is caused by a buffer overflow in the formAdvanceSetup function of the /goform/formAdvanceSetup file in D-Link DIR-513 version 1.10. The issue can be triggered by a POST request with a manipulated webpage argument, allowing for remote attacks. Defenders should prioritize verifying if any D-Link DIR-513 devices are still in use within their networks and assess exposure to remote attacks. The CVE record and NVD entry provide details about the vulnerability, including its CVSS score and affected product information.

Defensive priority

Defenders should prioritize verifying if any D-Link DIR-513 devices are still in use within their networks and assess exposure to remote attacks.

Recommended defensive actions

• Verify if D-Link DIR-513 devices are still in use within the network
• Assess exposure to remote attacks
• Consider replacing unsupported devices
• 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

Evidence notes

The CVE record and NVD entry provide details about the vulnerability, including its CVSS score and affected product information. However, there is limited information on potential exploits or attacks.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.