Answer in brief
CVE-2026-73446 records a High severity (CVSS 7.0) vulnerability in Security Advisory 0160. The current sources do not mark it as known exploited. The current feed maps Arista Networks/EOS (generic), Arista Networks/EOS (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Arista Networks/EOS (generic), Arista Networks/EOS (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Arista Networks/EOSgeneric | >=4.36.0 <=4.36.1F || >=4.35.0 <=4.35.5M || >=4.34.0 <=4.34.7.1M || >=4.33.0 <=4.33.9M || >=4.32.0 <4.33.0F || >=4.31.0 <4.32.0F | 4.33.0F, 4.32.0F |
| Arista Networks/EOSgeneric | 4.36.0 || 4.35.0 || 4.34.0 || 4.33.0 || >=4.32.0 <4.33.0F || >=4.31.0 <4.32.0F | 4.33.0F, 4.32.0F |
Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 15, 2026
On affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-IS Hello Protocol Data Unit (PDU) that causes the device to tear down an established IS-IS adjacency. This may result in traffic disruption and loss of IP reachability for prefixes advertised through that adjacency.
Quoted source text, attributed separately from HOL analysis.