Answer in brief
CVE-2026-121286 records a Medium severity (CVSS 6.0) vulnerability in Security Advisory 0213. The current sources do not mark it as known exploited. The current feed maps 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 6.0. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Arista Networks/EOSgeneric | >=4.36.0F <=4.36.2F || >=4.35.0F <=4.35.6M || >=4.34.0F <=4.34.8M || >=4.33.0F <=4.33.10M || >=4.32.0F <4.33.0F || >=4.22.1F <4.32.0F | Not reported |
Published upstream
Nov 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 10, 2026
On affected platforms running Arista EOS in multi-agent routing model with BGP Segment Routing Traffic Engineering (SR-TE) address family configured, a BGP peer can send crafted BGP packets to cause the BGP process to restart, disrupting all BGP sessions on the device.
Quoted source text, attributed separately from HOL analysis.