CVE-2026-102169: Security Advisory 0194

Published Oct 6, 2026

Updated

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 Software

1 affected component

Arista Arista Wi-Fi access points

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Arista Wi-Fi access points to a version that resolves this vulnerability.
Fixed in 21.4.0M-12
Upgrade
Upgrade Arista Wi-Fi access points to a version that resolves this vulnerability.
Fixed in 22.1.1F-61

Event History

Oct 6, 2026

CVE Published

via MITRE·07:40 PM

Data Sourced

via MITRE·07:40 PM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·08:17 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Which deployments are exposed to this denial-of-service issue?

Affected Arista Wi-Fi access points are exposed when Captive Portal is enabled on an SSID. An attacker must be an unauthenticated wireless client connected to that captive-portal-enabled SSID.

What does an attacker need to do, and what is the impact?

The attacker sends a crafted HTTP request to crash the portal service. Although the service automatically restarts, a sustained low-rate attack can keep the captive portal unavailable; remote code execution is not possible.