CVE-2026-71957: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in D-Link Corporation DWR-M961
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.
AI Analysis
Technical Summary
The D-Link DWR-M961 router, specifically hardware version C1 running software version 1.1.2_C1_202602110044, contains a classic buffer overflow vulnerability in the app.cgi interface. An attacker can exploit this by crafting a payload that writes an excessively long string to the netAcc.addlist[].name field, leading to arbitrary command execution or device crash. The vulnerability has a CVSS 4.0 score of 9.3, indicating critical severity with network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation can lead to arbitrary command execution on the affected device or cause it to crash, resulting in denial of service. The vulnerability is remotely exploitable without authentication, posing a significant risk to device security and network integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor D-Link's official channels for updates and apply patches once available. Until then, restricting network access to the device's management interface may reduce exposure.
CVE-2026-71957: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in D-Link Corporation DWR-M961
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 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.
CVSS v4.0
Score 9.3critical
Affected software
D-Link Corporation
DWR-M961
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The D-Link DWR-M961 router, specifically hardware version C1 running software version 1.1.2_C1_202602110044, contains a classic buffer overflow vulnerability in the app.cgi interface. An attacker can exploit this by crafting a payload that writes an excessively long string to the netAcc.addlist[].name field, leading to arbitrary command execution or device crash. The vulnerability has a CVSS 4.0 score of 9.3, indicating critical severity with network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation can lead to arbitrary command execution on the affected device or cause it to crash, resulting in denial of service. The vulnerability is remotely exploitable without authentication, posing a significant risk to device security and network integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Users should monitor D-Link's official channels for updates and apply patches once available. Until then, restricting network access to the device's management interface may reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-08T16:43:04.177Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a7766d6bf8831d539e949a5
Added to database: 08/08/2026, 17:26:46 UTC
Last enriched: 08/16/2026, 13:45:46 UTC
Last updated: 09/22/2026, 13:47:48 UTC
Views: 66
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