Description
On affected Arista Wi-Fi access points with Captive Portal enabled, an unauthenticated wireless client connected to a captive-portal-enabled SSID can crash the portal service with a crafted HTTP request. The service automatically restarts, but a sustained low-rate attack can cause a persistent denial of service of the captive portal. Remote code execution is not possible.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Arista Networks | Wi-Fi Access Points | 22.0.0 – ≤ 22.0.1F-32, 21.3.0 – ≤ 21.3.0M-13, 1.0.0 – < 21.3.0 | 21.3.0 |
Advisories 1
- WID-SEC-2026-3775 Arista WiFi Access Point: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 6, 2026