CVE-2026-71957: D-Link DWR-M961 Buffer Overflow via app.cgi

Published Aug 8, 2026

Updated

D-Link DWR-M961 devices with hardware version C1 and software version 1.1.2C1202602110044 contain a buffer overflow vulnerability in the app.cgi interface. A remote attacker can write an overly long string to the netAcc.addlist[].name field and execute arbitrary commands by crafting a specific payload, or cause the device to crash.

Affected Software

1 affected component

D-Link DWR-M961=1.1.2_C1_202602110044

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade D-Link DWR-M961 to a version that resolves this vulnerability.
Fixed in 1.1.2_C1_202602110044

Event History

Aug 8, 2026

CVE Published

via MITRE·05:06 PM

Data Sourced

via MITRE·05:06 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2026-71957?

CVE-2026-71957 has a critical severity rating of 9.8.

How do I fix CVE-2026-71957?

To mitigate CVE-2026-71957, update your D-Link DWR-M961 device to the latest firmware version provided by D-Link.

What type of vulnerability is CVE-2026-71957?

CVE-2026-71957 is categorized as a Buffer Overflow vulnerability.

Which D-Link devices are affected by CVE-2026-71957?

CVE-2026-71957 affects D-Link DWR-M961 devices with hardware version C1 and software version 1.1.2_C1_202602110044.

What can an attacker do with the CVE-2026-71957 vulnerability?

An attacker can execute arbitrary commands on the affected D-Link DWR-M961 devices by exploiting the buffer overflow in the app.cgi interface.