CVE-2026-102169: CWE-476 NULL Pointer Dereference in Arista Networks Wi-Fi Access Points
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.
CVSS v3.1
Score 6.5medium
Affected software
Arista Networks
Wi-Fi Access Points
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-476 NULL Pointer Dereference) affects Arista Wi-Fi Access Points with Captive Portal enabled. An unauthenticated attacker connected to the captive portal SSID can craft an HTTP request that crashes the portal service by triggering a NULL pointer dereference. The portal service restarts automatically after a crash, but repeated low-rate attacks can cause a persistent denial of service condition. No remote code execution or data confidentiality/integrity impact is reported.
Potential Impact
The vulnerability results in a denial of service condition on the captive portal service of affected Arista Wi-Fi Access Points. The portal service crashes and restarts automatically, but a sustained low-rate attack can maintain the denial of service, disrupting captive portal functionality. There is no impact on confidentiality or integrity, and remote code execution is not possible.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the service restarts automatically after a crash, no immediate workaround is indicated. Monitoring for updates from Arista Networks is recommended to obtain any official fixes or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Arista
- Date Reserved
- 2026-09-28T17:45:17.723Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac550db2cdf04f656d8a123
Added to database: 10/06/2026, 19:49:47 UTC
Last enriched: 10/06/2026, 20:19:42 UTC
Last updated: 10/06/2026, 20:49:08 UTC
Views: 7
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