CVE-2026-6157 Totolink A800R app.so setAppEasyWizardConfig buffer overflow
Remote attackers can trigger a buffer overflow in the Totolink A800R router's app.so library via the apcliSsid argument, 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-2026-6157?
CVE-2026-6157 is a high-severity memory corruption vulnerability in Totolink A800R, published on 13 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was detected in Totolink A800R 4.1.2cu.5137_B20200730. This impacts the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. The manipulation of the argument apcliSsid results in buffer overflow. The attack can be executed remotely. The exploit is now public and may be used.
Which versions are affected by CVE-2026-6157?
How do I fix CVE-2026-6157?
No fix has been published for CVE-2026-6157 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-2026-6157 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6157 exists.
Sources
Also known as GHSA-wr33-grpc-5346.