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Out-of-bounds read in Arista Wi-Fi access points leaks memory

Priority LOW 11CWE-125Published · Updated

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

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00191 8th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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

VendorProductAffected versionsFixed inStatusSource
AristaWi-Fi Access Points22.0.0 – 22.0.1F-32; 21.3.0 – 21.3.0M-13; 1.0.0 to before 21.3.0—No fix listedCNA
  • Wi-Fi Access Points VendorArista Affected 22.0.0 – 22.0.1F-32; 21.3.0 – 21.3.0M-13; 1.0.0 to before 21.3.0 Fixed in — No fix listed CNA

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

  1. 2026-10-06 Threatist record created from CVE-2026-102164
  2. 2026-10-07 Alias added: GHSA-39p9-4mhh-h995

References

  • 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
See all 216 →

Sources