Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since June 9, 2026.
CVE-2026-7473
Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability
Arista · Extensible Operating System
Published July 21, 2026
What happened
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.
What it means for your business
Arista Extensible Operating System is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-7473). 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. CISA remediation due date: 2026-06-23. PremierePC tracks KEV alerts for Upstate SC businesses — patch or open a ticket if you need help verifying exposure.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: June 23, 2026
Sources
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