CVE-2026-73459: CWE-354: Improper Validation of Integrity Check Value in Arista Networks EOS
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.
CVE-2026-73459: CWE-354: Improper Validation of Integrity Check Value in Arista Networks EOS
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.
CVSS v3.1
Score 7.4high
Affected software
Arista Networks
EOS
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Arista
- Date Reserved
- 2026-08-12T16:45:03.511Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa9d57455bf5e2cf587e5ff
Added to database: 09/15/2026, 23:32:04 UTC
Last updated: 09/15/2026, 23:32:04 UTC
Views: 1
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.