CVE-2026-73460
Security Advisory 0160
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
On affected platforms running Arista EOS with IS-IS graceful restart enabled, an unauthenticated attacker who can inject a malformed IS-IS LSP PDU packet can cause the IS-IS graceful restart procedure to terminate prematurely. This may result in traffic loss following a restart event.
| CWE | CWE-863 |
| Vendor | arista networks |
| Product | eos |
| Published | Sep 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Arista Networks / EOS
4.36.0 ≤ 4.36.1F
References
Credits
This issue was discovered internally by Arista and the company is not aware of any malicious uses of these issues in customer networks.