CVE-2026-121291: Security Advisory 0222
Arista Networks · EOS
Vendor fix available · Affected: Arista Networks EOS · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 36% of scored CVEs
DescriptionCVE.org
A crafted Error Report can leave EOS stuck believing that a cache reset is in progress, preventing ROA publication, withdrawal reconciliation, and BGP origin-validation updates.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Arista Networks · EOS4.37.0F; from 4.36.0F up to and including 4.36.2F; from 4.35.0F up to and including 4.35.6M
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Arista Networks
- Published
- November 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-121291 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.