CVE-2026-71911

High

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.

SeverityHigh

CVSS7.2

Exploit probability—

ProductVigorAP 918R

PublishedAug 24, 2026

First seenAug 24, 2026

Weakness typeCWE-120CWE-120

How to fix

Update

DrayTek Corporation VigorAP 918R1.4.11 or later
DrayTek Corporation VigorAP 960C1.4.12 or later
DrayTek Corporation VigorAP 1060C1.4.12 or later
DrayTek Corporation VigorAP 9061.4.13 or later
DrayTek Corporation VigorAP 912C1.4.15 or later
DrayTek Corporation VigorAP 9031.4.22 or later

Vendor advisories

draytek.com/about/security-advisory/multiple-remote-code-execution-and-buffer-overflow-vulnerabilities-in-vigorap-series-august-2026/

Affected products

Product	Affected versions	Fixed in
DrayTek Corporation VigorAP 918R	v < 1.4.11	1.4.11
DrayTek Corporation VigorAP 960C	v < 1.4.12	1.4.12
DrayTek Corporation VigorAP 1060C	v < 1.4.12	1.4.12
DrayTek Corporation VigorAP 906	v < 1.4.13	1.4.13
DrayTek Corporation VigorAP 912C	v < 1.4.15	1.4.15
DrayTek Corporation VigorAP 903	v < 1.4.22	1.4.22

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