Improper Certificate Validation in Arista Extensible Operating System (EOS) - CVE-2026-52896
Published: June 24, 2026
Vulnerability identifier: #VU135096
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-52896
CWE-ID: CWE-295
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 attacker to disclose sensitive information.
The vulnerability exists due to improper certificate validation in the Streaming Telemetry Agent (TerminAttr) when using grpc tunnel. A remote attacker can present a certificate that is improperly validated to disclose sensitive information.
Only certain configurations using grpc tunnel are vulnerable.
How to mitigate CVE-2026-52896
Install security update from vendor's website.