CVE-2026-71958

CRITICAL 9.8

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

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-120
Vendor	d-link corporation
Product	dwr-m961
Published	Aug 8, 2026
Last Updated	Aug 8, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

D-Link Corporation / DWR-M961

0 < 1.1.5_C1_202607071108

References

NVD ↗ CVE.org ↗ EPSS Data ↗

supportannouncement.us.dlink.com: https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10512 dlink.com: https://www.dlink.com/middle-east/en/products/dwr-m961-4g-ac1200-lte-router vulncheck.com: https://www.vulncheck.com/advisories/d-link-dwr-m961-buffer-overflow-via-quicksetup-cgi

Credits

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