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EUVDEUVD-2026-80065

| CVE-2026-73459 HIGH
Improper Validation of Integrity Check Value (CWE-354)
2026-09-16 psirt@arista.com GHSA-vq63-cff6-37q2
Code Injection
7.0
CVSS 4.0 · Vendor: arista
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Severity by source

Vendor (arista) PRIMARY
7.0 HIGH
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

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Sep 16, 2026 - 00:35 vuln.today
CVE Published
Sep 16, 2026 - 00:17 cve.org
HIGH 7.0

DescriptionCVE.org

On affected platforms running Arista EOS with IS-IS configured, an unauthenticated attacker who can inject a specially crafted IS-IS LSP PDU can cause the legitimate LSP to be unexpectedly purged from the IS-IS link-state database. This may result in traffic loss.

AnalysisAI

Let me synthesize. CVE-2026-73459: Arista EOS IS-IS LSP purge via crafted IS-IS LSP PDU. …

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EUVD-2026-80065 vulnerability details – vuln.today
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