High severity7.4NVD Advisory· Published Sep 16, 2026
CVE-2026-73459
CVE-2026-73459
Description
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.
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Affected products
1Patches
Vulnerability mechanics
References
1News mentions
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