Execution with unnecessary privileges in Arista Extensible Operating System (EOS) - CVE-2026-11705
Published: June 24, 2026
Vulnerability identifier: #VU135094
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-11705
CWE-ID: CWE-250
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Arista Networks
Affected software:
Arista Extensible Operating System (EOS)
Arista Extensible Operating System (EOS)
Detailed vulnerability description
The vulnerability allows a remote user to modify system data.
The vulnerability exists due to execution with unnecessary privileges in the Streaming Telemetry Agent (TerminAttrRW) when processing a crafted set of packets. A remote user can send a crafted set of packets to modify system data.
Exploitation requires the agent to be active in a specific non-default configuration and configured to stream as TerminAttrRW.
How to mitigate CVE-2026-11705
Install security update from vendor's website.