CVE-2026-71911
8.6
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| DrayTek Corporation | VigorAP 918R | 0 < 1.4.11 | affected |
| DrayTek Corporation | VigorAP 960C | 0 < 1.4.12 | affected |
| DrayTek Corporation | VigorAP 1060C | 0 < 1.4.12 | affected |
| DrayTek Corporation | VigorAP 906 | 0 < 1.4.13 | affected |
| DrayTek Corporation | VigorAP 912C | 0 < 1.4.15 | affected |
| DrayTek Corporation | VigorAP 903 | 0 < 1.4.22 | affected |
Weaknesses
- CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
References
- https://www.draytek.com/about/security-advisory/multiple-remote-code-execution-and-buffer-overflow-vulnerabilities-in-vigorap-series-august-2026/
- https://www.vulncheck.com/advisories/draytek-vigorap-multiple-models-buffer-overflow-via-setlan
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