CVE-2026-121293 · Infrastructure
NO FIX YET
On affected Arista EOS-based network platforms, a peer that controls a BGP session with the Dynamic Path Selection address family can send a crafted BGP message. This terminates the BGP process, resetting all BGP sessions and disrupting routing until the process restarts.
first public Nov 10, 2026 · 1 source
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Network operators running EOS-based switches or routers that peer over BGP with the Dynamic Path Selection address family negotiated. An attacker must control a BGP peer, so exposure depends on who can establish sessions with the device. Devices without DPS negotiated, or without untrusted BGP peers, are less exposed. The sources do not list affected EOS versions.
Not affected if no-dps-address-family, no-untrusted-bgp-peers
Who cares arista-eos, bgp, network-devices
Unknown from the sources.
No fix yet, per the sources.
On affected EOS-based platforms, an attacker who controls a Border Gateway Protocol (BGP) peer can send a crafted BGP message over an established session with the Dynamic Path Selection (DPS) address family negotiated. This can cause the BGP process to terminate unexpectedly, resetting all BGP sessions and disrupting routing services until the process restarts.
This page as .md · .json · CVSS:4.0/AV:N/AC:H/AT:P/PR:H/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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