CVE-2026-82616 TOTOLINK NR1800X cstecgi.cgi setUploadSetting stack-based overflow
Remote attackers can trigger a stack-based buffer overflow in the setUploadSetting function of TOTOLINK NR1800X routers, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82616?
CVE-2026-82616 is a critical memory corruption vulnerability in TOTOLINK NR1800X, published on 31 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in TOTOLINK NR1800X 9.1.0u.6681_B20230703. Impacted is the function setUploadSetting of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used.
Which versions are affected by CVE-2026-82616?
How do I fix CVE-2026-82616?
No fix has been published for CVE-2026-82616 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-2026-82616 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82616 exists.
Sources
Also known as GHSA-6hvp-8ww9-6wc7.