by Kastro
Paper/Archive/CVE-2026-121370

CVE-2026-121370

Arista Networks EOS — Security Advisory 0224

CVSS 9.2
critical.is priorityof 100
28
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

On affected platforms running Arista EOS with Precision Time Protocol (PTP) configured, an unauthenticated attacker with network access to a PTP-enabled port can create a denial of service (DoS) condition by sending traffic to the system.

Affected

ProductAffectedFixed inSource
EOS4.34.0F – 4.34.1F–CNA
EOS4.33.0F – 4.33.8M–CNA
EOS4.32.0F – < 4.33.0F4.33.0FCNA
EOS4.31.0F – < 4.32.0F4.32.0FCNA
EOS4.30.0F – < 4.31.0F4.31.0FCNA
EOS4.29.2F – < 4.30.0F4.30.0FCNA

Scores by source

Arista (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Arista (CNA)8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

advisoryarista.com/en/support/advisories-notices/security-advisory/25046-security-advisory-0224