SEPTEMBER 18, 2026
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Case File

CVE-2026-71938

HIGH · CVSS 7.2 EPSS 0.48% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-24 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

Multiple DrayTek VigorSwitch models are vulnerable to a buffer overflow in the switch_lan_gvrp function due to unsafe copying of the portList field into an insufficiently sized buffer. A remote attacker with valid administrative credentials can exploit this vulnerability to trigger a denial of service or potentially execute arbitrary commands on the device. Organizations using affected VigorSwitch models should prioritize patching to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-71938
Severity
HIGH
CVSS
7.2
EPSS
0.48%

Original NVD Description

Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the switch_lan_gvrp function. The vulnerability is caused by unsafe copying of the portList field into an undersized buffer. 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.