Vulnerability · Published Oct 6, 2026 · Assigned by Arista

CVE-2026-102169Security Advisory 0194

Medium 6.5

In plain English

A medium-severity null pointer dereference in Wi-Fi Access Points from Arista Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 79.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Arista Networks	Wi-Fi Access Points	22.0.0 – through 22.0.1F-3221.3.0 – through 21.3.0M-131.0.0 – before 21.3.0

Weakness: CWE-476 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://www.arista.com/en/support/advisories-notices/security-advisory/24810-security-advisory-0194 vendor-advisory