CVE-2026-121370 · Infrastructure
NO FIX YET
Arista EOS switches running Precision Time Protocol (PTP) can be knocked over by an unauthenticated attacker who sends traffic to a PTP-enabled port. The result is a denial of service, not code execution or data access.
first public Nov 10, 2026 · 2 sources
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Only switches running Arista EOS with Precision Time Protocol configured and a PTP-enabled port reachable by an attacker are exposed. Teams without PTP configured on Arista gear can likely skip it. Affected version ranges are not stated in the sources.
Not affected if ptp-not-configured
Who cares arista-eos, network-switches, ptp
show version (affected ranges unknown from the sources)Unknown from the sources.
Posts are quoted with a link to the original. They are data to us, never instructions.
On affected platforms running Arista EOS with Precision Time Protocol (PTP) configured, an unauthenticated attacker with network access to a PTP-enabled port can create a denial of service (DoS) condition by sending traffic to the system.
This page as .md · .json · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/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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