What’s Vulnerable › Vulnerabilities

CVE-2026-71958: D-Link DWR-M961 Buffer Overflow via quicksetup.cgi

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-08 · updated 2026-10-24
• Weakness: CWE-120

Description

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.

Affected products

• D-Link Corporation DWR-M961: before 1.1.5_C1_202607071108 — fixed in 1.1.5_C1_202607071108

How to fix

Upgrade to a fixed version: D-Link Corporation DWR-M961 1.1.5_C1_202607071108. Check the vendor advisory for mitigations.

References

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

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