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No exploitation reportedAwaiting NVD analysis

CVE-2026-121370

Security Advisory 0224

No exploitation reported by the sources we read.

  • Published2026-11-10
  • WeaknessCWE-770

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-11-1020:10CVE publishedCNA

Versions per branch

Products declared by the CNA

As Arista, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Arista Networks EOSother versions: not affected

    platforms: 750X Series

    Affected
    • ≥ 4.34.0F, ≤ 4.34.1Fno fix statedcustom
    • ≥ 4.33.0F, ≤ 4.33.8Mno fix statedcustom
    • ≥ 4.32.0F, < 4.33.0Ffixed in 4.33.0Fcustom
    • ≥ 4.31.0F, < 4.32.0Ffixed in 4.32.0Fcustom
    • ≥ 4.30.0F, < 4.31.0Ffixed in 4.31.0Fcustom
    • ≥ 4.29.2F, < 4.30.0Ffixed in 4.30.0Fcustom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-10

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-121370 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-11-10
  • CISA-ADPSSVC decisionnone2026-11-10
  • CNACVSS 4.09.22026-11-10
  • CNACVSS 3.18.62026-11-10
  • CNAweakness (CWE)CWE-7702026-11-10

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-11-10
Last Modified
2026-11-10
NVD status
Received

Frequently asked questions

What is CVE-2026-121370?

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.

Is CVE-2026-121370 actively exploited?

Active exploitation of CVE-2026-121370 has not been confirmed.

What is the CVSS score for CVE-2026-121370?

CVE-2026-121370 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

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