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D-Link DWR-M961 C1 app.cgi Overflows a Stack Buffer on a Long netAcc.addlist[].name Value, Enabling Unauthenticated Remote Code Execution

Last refreshed2026-09-28

Status: NEW  |  Advisory ID: CVE-2026-71957

Key Details

CVECVE-2026-71957
CVSS Score / Version9.8 (Critical) / CVSS v3.1
Updated2026-08-31
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Proseattack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Classified asCWE-120 (Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'))

What to Know

D-Link DWR-M961 devices with hardware version C1 and software version 1.1.2_C1_202602110044 contain a buffer overflow vulnerability in the app.cgi interface. A remote attacker can write an overly long string to the netAcc.addlist[].name field and execute arbitrary commands by crafting a specific payload, or cause the device to crash. (NVD)

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-71957
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-71957