CVE-2026-71911 DrayTek VigorAP Multiple Models Buffer Overflow via setLan
Remote attackers with admin credentials can trigger a buffer overflow in DrayTek VigorAP devices, leading to denial of service or arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71911?
CVE-2026-71911 is a high-severity memory corruption vulnerability in DrayTek Corporation VigorAP 1060C, published on 24 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Multiple DrayTek VigorAP models contain a buffer overflow vulnerability in the setLan function. The vulnerability is caused by missing length checks during memory copy operations involving the lanVlanId0, lanIp, and lanNetmask fields. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. Exploitation requires valid administrative credentials for the device's web management interface.
Weakness: CWE-120
Which versions are affected by CVE-2026-71911?
How do I fix CVE-2026-71911?
No fix has been published for CVE-2026-71911 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-2026-71911 being exploited?
There is no known exploitation of CVE-2026-71911 in the wild and no public exploit code.
Sources
Also known as GHSA-79vq-rxp3-f6f5.