CVE-2026-7853 D-Link CVE debrief

Who should care

Users of D-Link DI-8100, especially those with exposure to the internet, should be aware of this vulnerability and take necessary precautions. This includes administrators of networks where D-Link DI-8100 devices are deployed, as well as security teams responsible for monitoring and mitigating potential threats.

Technical summary

The vulnerability is caused by a buffer overflow in the sprintf function of the /auto_reboot.asp file in the HTTP Handler component of D-Link DI-8100 16.07.26A1. The buffer overflow occurs when the enable/time argument is manipulated, allowing for remote exploitation. This issue can be exploited remotely, and the exploit has been made publicly available. Users of D-Link DI-8100, especially those with exposure to the internet, should be aware of this vulnerability and take necessary precautions, including applying vendor patches or updates if available, implementing network segmentation or isolation, monitoring for suspicious activity, restricting access to the affected system, performing regular vulnerability assessments, reviewing compensating controls for exposed systems while remediation is scheduled and verified, and tracking exceptions, retesting remediated assets, and closing the item only after evidence is documented. Evidence of exploitation attempts may be limited due to the public availability of the exploit. Defenders should verify system logs for suspicious activity related to the HTTP Handler component.

Defensive priority

High priority due to high CVSS score and public exploit availability.

Recommended defensive actions

• Apply vendor patches or updates if available
• Implement network segmentation or isolation
• Monitor for suspicious activity
• Restrict access to the affected system
• Perform regular vulnerability assessments
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-05-05T18:16:04.123Z and was last modified on 2026-07-24T08:10:00.150Z. The NVD entry is currently Analyzed. The vulnerability affects D-Link DI-8100 16.07.26A1. Evidence of exploitation attempts may be limited due to the public availability of the exploit. Defenders should verify system logs for suspicious activity related to the HTTP Handler component.

Official resources