What is CVE-2026-71958?

CVE-2026-71958 is a critical-severity vulnerability in D-link Corporation Dwr-m961, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2026-08-08.

How severe is CVE-2026-71958?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in D-link Corporation Dwr-m961

CVE-2026-71958

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 u…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

D-link Corporation Dwr-m961 — versions 0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

disclosure@vulncheck.com (vendor-advisory, patch)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-71958?: CVE-2026-71958 is a critical-severity vulnerability in D-link Corporation Dwr-m961, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2026-08-08.
How severe is CVE-2026-71958?: Critical severity. CVSS v3 base score is 9.8 out of 10.