Improper Certificate Validation in Arista Extensible Operating System (EOS) - CVE-2026-52896
Published: June 24, 2026
Vulnerability identifier: #VU135096
CSH Severity: Medium
CVSS v4: 8.2 [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]
CVE-ID: CVE-2026-52896
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Arista Extensible Operating System (EOS)
How to mitigate CVE-2026-52896
Install security update from vendor's website.
Arista Extensible Operating System (EOS) - addressed in versions 4.33.9M, 4.34.8M, 4.35.6M, 4.36.1F