EUVD-2026-80064
GHSA-gq4c-29w8-926p
Severity by source
CVSS:4.0/AV:A/AC:L/AT:P/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
Primary rating from Vendor (arista) · only source for this CVE.
CVSS VectorVendor: arista
Lifecycle Timeline
3DescriptionCVE.org
On affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-IS Hello Protocol Data Unit (PDU) that causes the device to tear down an established IS-IS adjacency. This may result in traffic disruption and loss of IP reachability for prefixes advertised through that adjacency.
AnalysisAI
Unauthenticated attackers positioned on the same Layer 2 broadcast segment as an Arista EOS device can force that device to tear down an established IS-IS adjacency by sending a crafted IS-IS Hello P
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Same weakness CWE-696 – Incorrect Behavior Order
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External POC / Exploit Code
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