CVE-2026-71958 PUBLISHED

D-Link DWR-M961 Buffer Overflow via quicksetup.cgi

Assigner: VulnCheck
Reserved: 08.08.2026 Published: 08.08.2026 Updated: 08.08.2026

D-Link DWR-M961 devices with hardware version C1 and software version 1.1.2_C1_202602110044 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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	D-Link Corporation
Product	DWR-M961
Versions	Default: affected affected from 0 to 1.1.5_C1_202607071108 (excl.)

Credits

Jincheng Wang (@winmt), Professor Le Yu of Nanjing University of Posts and Telecommunications, and Professor Xiapu Luo of The Hong Kong Polytechnic University finder

References

Problem Types

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE