Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability (CVE-2026-7473)
Severity: medium · Patch status: unknown · Since 2026-06-09 · 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 added CVE-2026-7473 to its Known Exploited Vulnerabilities catalog on Jun 9, 2026, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Jun 23, 2026 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch