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 username fields and execute arbitrary commands by crafting a specific payload, or cause the device to crash.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.006 (45.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- D-Link Corporation Dwr-M961 — versions 0
Weakness classification (CWE)
References
- supportannouncement.us.dlink.com/security/publication.aspx (vendor-advisory, patch)
- www.dlink.com/middle-east/en/products/dwr-m961-4g-ac1200-lte-router (product)
- www.vulncheck.com/advisories/d-link-dwr-m961-buffer-overflow-via-quicksetup-cgi (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.