CVE-2025-7048 Arista Networks CVE debrief

Who should care

Defenders responsible for Arista EOS platforms with MACsec configuration should assess potential exposure and disruption of dataplane traffic. This includes operators, security teams, and vulnerability management teams who need to verify exposure, assess potential disruption, and review MACsec configurations to prevent exploitation.

Why it matters

Defenders should prioritize verifying exposure and assessing potential disruption of dataplane traffic on Arista EOS platforms with MACsec configuration due to the vulnerability.

• Verification of exposure on Arista EOS platforms with MACsec configuration
• Potential disruption of dataplane traffic due to MACsec process termination
• Assessment of MACsec configurations to prevent exploitation

Technical summary

A specially crafted packet can cause the MACsec process to terminate unexpectedly on affected Arista EOS platforms with MACsec configuration. Continuous receipt of these packets with certain MACsec configurations can cause longer term disruption of dataplane traffic. The vulnerability affects Arista EOS platforms with MACsec configuration, and defenders should assess potential exposure and disruption of dataplane traffic. The MACsec process termination can lead to verification of exposure, potential disruption of dataplane traffic, and assessment of MACsec configurations to prevent exploitation.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential disruption of dataplane traffic on Arista EOS platforms with MACsec configuration.

Recommended defensive actions

• Verify exposure of Arista EOS platforms with MACsec configuration
• Assess potential disruption of dataplane traffic
• Review and update MACsec configurations to prevent exploitation
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but the scope of affected platforms and versions is not explicitly stated. The Arista security advisory provides additional context on the vulnerability, including affected platforms and potential mitigations. Defenders should verify exposure and assess potential disruption of dataplane traffic on Arista EOS platforms with MACsec configuration. The CVE Program record and NVD detail page offer source-provided CVE metadata and official vulnerability assessment.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.