CVE-2026-73469

published 2026-09-16

CVE-2026-73469: When specific platforms are using Arista EOS with a loose Unicast Reverse Path Forwarding (uRPF) configuration, certain traffic may not be subjected to the…

Priority P4 34 medium 5.8 CVSS 3.1

AV N AC L PR N UI N S C C N I L A N

When specific platforms are using Arista EOS with a loose Unicast Reverse Path Forwarding (uRPF) configuration, certain traffic may not be subjected to the intended verification drop. Consequently, traffic that should be dropped based on these routes could still be processed and forwarded by the device.

This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
arista_networks	eos	4.35.0F – 4.35.4M	—

CVSS provenance

nvd v3.1 5.8 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

nvd v4.0 6.9 MEDIUM CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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CWE-863