Security Advisory 0143

Security Advisory 0143 PDF Date: June 23, 2026 Revision | Date | Changes ---|---|--- 1.0 | Jun 23, 2026 | Initial release Description All of the CVEs covered in this advisory apply to affected platforms running Arista EOS with the Streaming Telemetry Agent aka TerminAttr enabled. This issue...

Arista Networks EOS Tunnel Decapsulation Improper Validation (SA0137)

On affected platforms running Arista EOS where a tunnel decapsulation configuration - such as VXLAN Virtual Extensible LAN, decap-groups, or a GRE Generic Routing Encapsulation tunnel interface - is present, the switch will incorrectly decapsulate and forward other unexpected tunneled packets wit...

Exploit for Incomplete Comparison with Missing Factors in Arista Eos

README.md markdown CVE-2026-7473 - Arista EOS Tunnel Decapsula...

CISA Adds Cisco, Chrome, and Arista Flaws to KEV Catalog Amid Active Exploitation

The U.S. Cybersecurity and Infrastructure Security Agency CISA on Tuesday added three new vulnerabilities to its Known Exploited Vulnerabilities KEV catalog, following reports of active exploitation. The list of vulnerabilities is as follows - CVE-2026-20245 CVSS score: 7.8 - An improper encoding...

CISA Adds Three Known Exploited Vulnerabilities to Catalog

CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities KEV Catalog, based on evidence of active exploitation. CVE-2026-7473link is external Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability CVE-2026-11645link is external Google...

Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability

Arista Extensible Operating System EOS contains an incomplete comparison with missing factors vulnerability when the switch incorrectly decapsulate and forwards other unexpected tunneled packet with a destination IP matching its configured decapsulation IP...

CVE-2026-7473

On affected platforms running Arista EOS where a tunnel decapsulation configuration—such as VXLAN Virtual Extensible LAN, decap-groups, or a GRE Generic Routing Encapsulation tunnel interface—is present, the switch will incorrectly decapsulate and forward other unexpected tunneled packet with a...

CVE-2025-8873

On affected platforms running Arista EOS with IPsec configured, a specially crafted packet can cause the dataplane to stop processing all IPsec traffic. The control plane may detect this condition, and attempt to reset the IPsec processing pipeline. After reset traffic may not resume being...

CVE-2024-27890

Affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request can be run when it should have been rejected. This can result in unexpected configuration being applied to the switch...

CVE-2024-6858

In Arista’s EOS when in 802.1X mode, multi-auth unauthenticated hosts might be allowed access to a switch port if there exists an EAPOL capable device in the fallback VLAN...

CVE-2026-25624

An administrative cross-site scripting XSS vulnerability exists in the web user interface dashboard layout of Arista Edge Threat Management - Arista Next Generation Firewall NGFW. Unvalidated user-supplied variables are echoed back to administrative profiles, facilitating vector payload processin...

CVE-2026-25620

An encrypted password command injection vulnerability exists in the Captive Portal application framework of Arista Edge Threat Management - Arista Next Generation Firewall NGFW. This issue uniquely affects version 17.4.0; earlier software releases are not exposed...

CVE-2026-25622

A Captive Portal Custom Handler command injection vulnerability exists in Arista Edge Threat Management - Arista Next Generation Firewall NGFW. On affected platforms, an administrative account logged into the user interface can exploit this input handling behavior to execute arbitrary platform...

CVE-2026-25623

An input validation command execution vulnerability exists in the browser management pipeline of Arista Edge Threat Management - Arista Next Generation Firewall NGFW. Authenticated administrators can leverage this exposure to obtain underlying terminal script code processing execution permissions...

CVE-2026-25621

A Reports application infrastructure vulnerability exists in Arista Edge Threat Management - Arista Next Generation Firewall NGFW due to insecure input validation. This issue uniquely affects version 17.4.0; earlier software releases are not exposed...

EUVD-2026-34911

An administrative cross-site scripting XSS vulnerability exists in the web user interface dashboard layout of Arista Edge Threat Management - Arista Next Generation Firewall NGFW. Unvalidated user-supplied variables are echoed back to administrative profiles, facilitating vector payload processin...

CVE-2026-25624 Arista Edge Threat Management NGFW UI Administrative Cross-Site Scripting

An administrative cross-site scripting XSS vulnerability exists in the web user interface dashboard layout of Arista Edge Threat Management - Arista Next Generation Firewall NGFW. Unvalidated user-supplied variables are echoed back to administrative profiles, facilitating vector payload processin...

CVE-2026-25624

CVE-2026-25624 is an administrative cross-site scripting vulnerability in the web UI dashboard layout of Arista Edge Threat Management NGFW. The issue involves unvalidated user-supplied variables echoed back to administrative profiles, enabling XSS when an attacker has administrative UI access. A...

CVE-2026-25623

CVE-2026-25623 describes a command execution vulnerability in the browser management pipeline of Arista Edge Threat Management NGFW. The issue requires an authenticated administrative user with UI access and affects NGFW versions up to 17.4.0. The advisory indicates the vulnerability allows an ad...

CVE-2026-25623 Arista Edge Threat Management NGFW UI Arbitrary Command Execution

An input validation command execution vulnerability exists in the browser management pipeline of Arista Edge Threat Management - Arista Next Generation Firewall NGFW. Authenticated administrators can leverage this exposure to obtain underlying terminal script code processing execution permissions...