CVE-2026-71958: D-Link DWR-M961 Buffer Overflow via quicksetup.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 quicksetup.cgi interface. A remote attacker can write overly long strings to the test4, ssid2, and username fields 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·05:07 PM

Data Sourced

via MITRE·05:07 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2026-71958?

CVE-2026-71958 has a critical severity rating of 9.8.

How do I fix CVE-2026-71958?

To mitigate CVE-2026-71958, upgrade the D-Link DWR-M961 to the latest firmware version provided by D-Link.

What devices are affected by CVE-2026-71958?

CVE-2026-71958 affects D-Link DWR-M961 devices with hardware version C1 and software version 1.1.2_C1_202602110044.

What type of vulnerability is CVE-2026-71958?

CVE-2026-71958 is a buffer overflow vulnerability.

Can CVE-2026-71958 allow remote code execution?

Yes, CVE-2026-71958 can allow a remote attacker to execute arbitrary commands on the device.