CVE-2024-11185Network attack vector

VLAN isolation bypass via cross-VLAN packet forwarding

Published May 27, 2025 · Updated May 28, 2025

Improper resource isolation in Arista EOS affected releases allows remote attackers to breach VLAN boundaries via Layer 2 traffic. The Layer 2 forwarding path sends some ingress packets to ports assigned to different VLANs, while the underlying implementation defect is undisclosed. Exploitation requires IPv4 or IPv6 routing to be enabled and can expose or inject traffic across segmentation boundaries without interrupting service.

CVSS severity6.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper resource isolation in Arista EOS affected releases allows remote attackers to breach VLAN boundaries via Layer 2 traffic. The Layer 2 forwarding path sends some ingress packets to ports assigned to different VLANs, while the underlying implementation defect is undisclosed. Exploitation requires IPv4 or IPv6 routing to be enabled and can expose or inject traffic across segmentation boundaries without interrupting service.

The record

CVE
CVE-2024-11185
Published
May 27, 2025
Updated
May 28, 2025
Vendor
Arista Networks
Product
Arista EOS
Classifications
CWE-1189, T1599
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2025CVE publishedPublication date reported by the CVE source.
  2. May 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.29.0 <=4.29.10M
  2. Affected versionversion=4.30.0 <=4.30.9M
  3. Affected versionversion=4.31.0 <=4.31.6M
  4. Affected versionversion=4.32.0 <=4.32.3M
  5. Affected versionversion=4.33.0 <=4.33.1F

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Arista Networks · Arista EOSversion=4.29.0 <=4.29.10M; version=4.30.0 <=4.30.9M; version=4.31.0 <=4.31.6M; version=4.32.0 <=4.32.3M; version=4.33.0 <=4.33.1F

Published CVSS scores

6.5Arista NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1189Improper Isolation of Shared Resources on System-on-a-Chip (SoC)
T1599Network Boundary Bridging

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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