CVE-2024-12378Network attack vector

Cleartext tunnel traffic after Tunnelsec agent restart

Published May 8, 2025 · Updated May 8, 2025

Cleartext transmission in Arista Networks CloudVision Portal allows remote attackers to read Secure VXLAN traffic after Tunnelsec restarts. When the agent restarts, affected EOS software changes a secure tunnel from Established to Connected while continuing to exchange packets without encryption. Secure VXLAN must be configured; Arista's advisory lists CloudVision Portal as unaffected and limits affected platforms to four 7280CR3MK switch models.

CVSS severity9.1
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Arista Networks CloudVision Portal allows remote attackers to read Secure VXLAN traffic after Tunnelsec restarts. When the agent restarts, affected EOS software changes a secure tunnel from Established to Connected while continuing to exchange packets without encryption. Secure VXLAN must be configured; Arista's advisory lists CloudVision Portal as unaffected and limits affected platforms to four 7280CR3MK switch models.

The record

CVE
CVE-2024-12378
Published
May 8, 2025
Updated
May 8, 2025
Vendor
Arista Networks
Product
CloudVision Portal
Classifications
CWE-319, CAPEC-679, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2025CVE publishedPublication date reported by the CVE source.
  2. May 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=4.27.0 <=4.27.12M
  2. Affected versionversion=4.28.0 <=4.28.12M
  3. Affected versionversion=4.29.0 <=4.29.9M
  4. Affected versionversion=4.30.0 <=4.30.8M
  5. Affected versionversion=4.31.0 <=4.31.6M
  6. Affected versionversion=4.32.0 <=4.32.2F

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Arista Networks · CloudVision Portalversion=4.27.0 <=4.27.12M; version=4.28.0 <=4.28.12M; version=4.29.0 <=4.29.9M; version=4.30.0 <=4.30.8M; version=4.31.0 <=4.31.6M; version=4.32.0 <=4.32.2F

Published CVSS scores

9.1Arista NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-319Cleartext Transmission of Sensitive Information
CAPEC-679Exploitation of Improperly Configured or Implemented Memory Protections
T1040Network Sniffing

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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