CVE-2026-73467

Summary

On affected platforms running Arista EOS, under certain circumstances plaintext shared secrets for configured Terminal Access Controller Access-Control System Plus (TACACS+) servers

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 Tacacs level 6 tracing on agent Aaa.

switch(config)# no trace Aaa enable Tacacs levels 6

Clean Up Existing Log Files

If any of the above agent logging levels have been enabled, it’s necessary to clean up the existing log files to remove the already leaked secrets and keys.

Use the following commands to clean up Aaa or ConfigAgent log files:

switch(config)# bash sudo truncate -s 0 /var/log/agents/Aaa* switch(config)# bash sudo truncate -s 0 /var/log/agents/ConfigAgent*

 

Then use the following commands to clean up previously rotated old log files:

switch(config)# bash sudo find /var/log/agents -name 'Aaa*.gz' -type f -delete switch(config)# bash sudo find /var/log/agents -name 'ConfigAgent*.gz' -type f -delete

References