CVE-2026-73466

On affected platforms running Arista EOS, under certain circumstances plaintext user passwords

Published Sep 15, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed

Description

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 Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Arista Networks

EOS

unaffected

Version	Status	Constraints
`4.36.0`	affected	≤ 4.36.1F
`4.35.0`	affected	≤ 4.35.4M
`4.34.0`	affected	≤ 4.34.7M
`0.0.0`	affected	≤ 4.33.9M
`0`	affected	≤ 4.32.0
`0`	affected	≤ 4.31.0

No data.

Vendor Product Versions

Arista

Eos

Version	Status	Scheme	Platform
`[4.36.0,4.36.1F]`	affected	generic	—
`[4.35.0,4.35.4M]`	affected	generic	—
`[4.34.0,4.34.7M]`	affected	generic	—
`[0.0.0,4.33.9M]`	affected	generic	—
`[0,4.32.0]`	affected	generic	—
`[0,4.31.0]`	affected	generic	—

Remediation

Vendor Solution

CVE-2026-73465 has been fixed in the following releases: * 4.36.2F and later releases in the 4.36.x train. * 4.35.5M and later releases in the 4.35.x train. * 4.34.8M and later releases in the 4.34.x train. * 4.33.10M and later releases in the 4.33.x train.

Vendor Workaround

The workaround is to disable PyServer level 4 tracing on agent Aaa. switch(config)# no trace Aaa enable PyServer levels 4

Tracking

Advisories

No advisories available

Metrics

Attack Vector Local

Attack Complexity High

Privileges Required High

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

Attack Vector Local

Attack Complexity High

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.132% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://www.arista.com/en/support/advisories-notices/security-advisory/24709-security-advisory-0153

History

Nov 10, 2026 11:00 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Arista Arista eos
Vendors & Products		Arista Arista eos

Nov 3, 2026 11:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`	ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Sep 15, 2026 8:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 15, 2026 7:00 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		On affected platforms running Arista EOS, under certain circumstances plaintext user passwords
Weaknesses		CWE-532
References		https://www.arista.com/en/support/advisories-notices/security-advisory/24709-security-advisory-0153
Metrics		cvssV3_1 `{'score': 6.3, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H'}` cvssV4_0 `{'score': 6, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H'}`