EUVD Vulnerability Catalog

EUVD-2026-79238

Severity: CRITICAL Base Score: 9.2 CVSS Version: 4.0

Vulnerability Description

On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection (BFD) sessions configured, a specially crafted packet can cause the BFD session(s) to go down. This may result in undesirable network changes because various routing protocols monitor status on BFD session(s).

CVSS Vector Analysis

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:H

▪ Attack Vector (AV): Network

▪ Attack Complexity (AC): Low

▪ Attack Requirements (AT): None

▪ Privileges Required (PR): None

▪ User Interaction (UI): None

▪ Vulnerability Confidentiality Impact (VC): None

▪ Vulnerability Integrity Impact (VI): Low

▪ Vulnerability Availability Impact (VA): High

▪ Subsequent Confidentiality Impact (SC): None

▪ Subsequent Integrity Impact (SI): None

▪ Subsequent Availability Impact (SA): High

Affected Vendors & Systems

Vendor Arista Networks

References & Advisory Links

https://www.arista.com/en/support/advisories-notices/security-advisory/24710-security-advisory-0154

Metadata Profile

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

Arista

EPSS Probability

Known Aliases

CVE-2026-73458

Published On

2026-09-15

Last Updated

2026-09-15