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CVE-2026-71957 is a critical buffer overflow vulnerability in the web management interface of D-Link DWR-M961 routers, specifically affecting hardware version C1 with firmware prior to 1.1.5_C1_202607071108, including 1.1.2_C1_202602110044. The flaw is present in the app.cgi interface and is triggered through the netAcc functionality when an attacker supplies an overly long string to the netAcc.addlist[].name field. Insufficient bounds checking on this input can corrupt memory and enable remote exploitation over the network without authentication. Successful exploitation can result in arbitrary command execution on the device, reportedly with root privileges, or can destabilize the router and cause it to crash.
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No public exploit code observed for this vulnerability.
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9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Critical buffer overflow vulnerability in the D-Link DWR-M961 that allows unauthenticated remote code execution or denial of service.
A critical unauthenticated remote buffer overflow vulnerability in the D-Link DWR-M961 router's app.cgi netAcc functionality via the netAcc.addlist[].name field, enabling device compromise or crash.
A buffer overflow vulnerability in the app.cgi interface of D-Link DWR-M961 devices that can allow a remote attacker to execute arbitrary commands or crash the device.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.