Out-of-bounds read in Arista Wi-Fi access points leaks memory
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
Arista Wi-Fi Access Points from 22.0.0 through 22.0.1F-32, from 21.3.0 through 21.3.0M-13, and from 1.0.0 before 21.3.0 are affected. On access points configured with VXLAN tunnelling and L2-proxy, an out-of-bounds read (CWE-125) lets the device reveal memory contents in network traffic. A wireless client associated to the tunnelled SSID can trigger it with a crafted packet, but no write primitive or remote code execution is possible.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
On affected Arista access points configured with VXLAN tunnelling and L2-proxy (a specific configuration unique to the VESPA use-case), a wireless client associated to the tunnelled SSID can send a crafted packet, causing the access point to reveal memory contents in network traffic. No write primitive or remote code execution is possible.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Arista Wi-Fi Access Points.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Arista Networks Wi-Fi Access Points 21.3.0
5 records Highest priority Priority MEDIUM 2 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2026-68911 Stack overflow in Arista Wi-Fi access point wireless gateway servicePriority MEDIUM 42
- TI-2026-68915 Memory corruption in Arista Wi-Fi access pointsPriority MEDIUM 40
- TI-2026-68912 Out-of-bounds write in Arista Wi-Fi access point WIPS sensorPriority LOW 39
Timeline
- 2026-10-06 Threatist record created from CVE-2026-102164
- 2026-10-07 Alias added: GHSA-39p9-4mhh-h995
References
More Arista vulnerabilities
- TI-2026-79524 Privilege escalation in Arista VeloCloud Orchestrator on-premises KEVCVSS 4.0CRITICAL 9.4
- TI-2026-63212 Improper input validation in Arista VeloCloud Orchestrator On-Prem KEVCVSS 4.0CRITICAL 9.5
- TI-2026-13992 VeloCloud Orchestrator OS Command Injection KEVCVSS 4.0CRITICAL 10.0
- TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
- TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8
Sources
- CVE-2026-102164 · CVE Program
- CVE-2026-102164 · NVD
- FIRST EPSS
- GHSA-39p9-4mhh-h995 · GitHub Advisory Database · CC BY 4.0
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