CVE-2026-71958 D-Link DWR-M961 Buffer Overflow via quicksetup.cgi
Remote attackers can execute arbitrary commands or crash D-Link DWR-M961 routers via buffer overflow in quicksetup.cgi.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71958?
CVE-2026-71958 is a critical memory corruption vulnerability in D-Link Corporation DWR-M961, published on 8 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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 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.
Weakness: CWE-120
Which versions are affected by CVE-2026-71958?
How do I fix CVE-2026-71958?
No fix has been published for CVE-2026-71958 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-71958 being exploited?
There is no known exploitation of CVE-2026-71958 in the wild and no public exploit code.
Sources
Also known as GHSA-8mjf-qrcg-h2cj.