CVE-2026-73466

Summary

On affected platforms running Arista EOS, under certain circumstances user passwordss may be written in clear text to log files during operations when specialized non-standard debugging trace levels are explicitly enabled.

To exploit these vulnerabilities, a malicious actor must already possess authenticated local administrative access to the device shell, and specialized non-standard debugging trace levels must be explicitly enabled.

This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.

Affected Software

VendorProductVersion RangeStatus
Arista NetworksEOS4.36.0 <= 4.36.1Faffected
Arista NetworksEOS4.35.0 <= 4.35.4Maffected
Arista NetworksEOS4.34.0 <= 4.34.7Maffected
Arista NetworksEOS0.0.0 <= 4.33.9Maffected
Arista NetworksEOS0 <= 4.32.0affected
Arista NetworksEOS0 <= 4.31.0affected

Weaknesses

  • CWE-532: CWE-532 Insertion of Sensitive Information into Log File

Workarounds

The workaround is to disable PyServer level 4 tracing on agent Aaa.

switch(config)# no trace Aaa enable PyServer levels 4

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References