CVE-2026-73459
Security Advisory 0160
- State
- Published
- Severity
- 7.0 High
- Published
- Sep 15, 2026
- Updated
- Sep 16, 2026
- Reserved
- Aug 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 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 | Arista |
| 3.1 | 7.4 High | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | Arista |
Weaknesses
- CWE-354 Improper Validation of Integrity Check Value
Affected Products
| Product | Versions |
|---|---|
EOSArista Networks |
|
References
- Security Advisory 0160vendor-advisory
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