CVE-2026-73465

On affected platforms running Arista EOS, under certain circumstances plaintext private keys

Published Sep 15, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
Description
On affected platforms running Arista EOS, under certain circumstances plaintext private keys 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.

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

This vulnerability may lead to exposed private keys on log files. As such, the following messages may appear at /var/log/agents/ConfigAgent-*: 2026-05-07 02:42:18.537932 18813 MgmtSecuritySslCertK 3 validateRsaPrivateKey start: -----BEGIN RSA PRIVATE KEY-----   2026-05-07 02:42:18.537932 18813 MgmtSecuritySslCertK 3 _getPemCount start: -----BEGIN EC PRIVATE KEY-----   These messages can be found with the following grep command, when run from the bash shell: switch# grep "MgmtSecuritySslCertK" /var/log/agents/ConfigAgent-* | grep "PRIVATE KEY---"

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Arista
Arista eos
Vendors & Products Arista
Arista eos
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'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description On affected platforms running Arista EOS, under certain circumstances plaintext private keys 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 private keys
Weaknesses CWE-532
References
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Arista
Published
Updated
Sep 17, 2026, 11:57 AM
Reserved
Aug 12, 2026, 4:47 PM
Status
Awaiting Analysis
Published
Sep 15, 2026, 7:17 PM
Modified
Sep 17, 2026, 12:18 PM