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No exploitation reportedAwaiting NVD analysis

CVE-2026-120983

Security Advisory 0215

No exploitation reported by the sources we read.

  • Published2026-11-10
  • WeaknessCWE-284

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 EOS platforms where 802.1x is configured in multi-host authenticated mode and the device is configured with Policy Based Routing (PBR), traffic from unauthenticated hosts may be forwarded to the destination configured in the PBR policies. This could potentially allow unauthenticated hosts access to networks. Additionally Layer 2 and Layer 3 control packets from unauthenticated hosts may get copied to the CPU.

Timeline

dates in UTC
  1. 2026-11-1020:09CVE 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: 710 Series, 720D Series, 720XP/722XPM Series, 7010TX Series, 7320X Series, 7060X/X2/X4/X5/X6/XE7 Series, 7260X/X3 Series, 7300X/X3 Series, 7050X3/X4 Series, 750X Series, 7250 Series, 7358X4 Series, 7368X4 Series, 7388X5 Series

    Affected
    • ≥ 1.0.0, < 4.33.0Ffixed in 4.33.0Fcustom
    • ≥ 4.33.0F, ≤ 4.33.9Mno fix statedcustom
    • ≥ 4.34.0F, ≤ 4.34.7Mno fix statedcustom
    • ≥ 4.35.0F, ≤ 4.35.5Mno fix statedcustom
    • ≥ 4.36.0F, ≤ 4.36.1Fno fix statedcustom

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-2026-120983 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
  • CNACVSS 4.06.12026-11-10
  • CNACVSS 3.17.62026-11-10
  • CNAweakness (CWE)CWE-2842026-11-10

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
CVSS 4.0 vector
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/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-2026-120983?

On affected EOS platforms where 802.1x is configured in multi-host authenticated mode and the device is configured with Policy Based Routing (PBR), traffic from unauthenticated hosts may be forwarded to the destination configured in the PBR policies. This could potentially allow unauthenticated hosts access to networks. Additionally Layer 2 and Layer 3 control packets from unauthenticated hosts may get copied to the CPU.

Is CVE-2026-120983 actively exploited?

Active exploitation of CVE-2026-120983 has not been confirmed.

What is the CVSS score for CVE-2026-120983?

CVE-2026-120983 has a CVSS v3 base score of 7.6 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.

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