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CVE-2026-73466— On affected platforms running Arista EOS, under certain circumstances plaintext user passwords

Quick assessment

Affected
Arista Networks EOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在运行 Arista EOS 的受影响平台上，在特定情况下，当明确启用了专门的非标准调试跟踪级别时，用户密码可能会以明文形式写入日志文件。 要利用这些漏洞，攻击者必须已经拥有对设备 shell 的经过身份验证的本地管理员访问权限，并且必须明确启用专门的非标准调试跟踪级别。 该问题由 Arista 内部发现，该公司目前未发现在客户网络中存在针对此漏洞的恶意利用案例。

CVSS 6.3 · Medium

Possible ATT&CK Techniques 1 AI

T1562.001

Affected Version Matrix 6

VendorProduct Version RangeStatus
Arista Networks EOS 4.36.0≤ 4.36.1F affected
4.35.0≤ 4.35.4M affected
4.34.0≤ 4.34.7M affected
0.0.0≤ 4.33.9M affected
≤ 4.32.0 affected
≤ 4.31.0 affected
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I. Basic Information for CVE-2026-73466

Vulnerability Information
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Vulnerability Title
On affected platforms running Arista EOS, under certain circumstances plaintext user passwords
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过日志文件的信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Arista Networks EOS 4.36.0 ~ 4.36.1F -

II. Public POCs for CVE-2026-73466

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III. Intelligence Information for CVE-2026-73466

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Vendor Advisories for CVE-2026-73466 (1)

Same Patch Batch · Arista Networks · 2026-09-15 · 12 CVEs total

CVE-2026-73437 9.6 CRITICAL On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) r
CVE-2026-73458 8.2 HIGH On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detec
CVE-2026-73459 7.4 HIGH Security Advisory 0160
CVE-2026-73446 7.4 HIGH Security Advisory 0160
CVE-2026-19655 6.5 MEDIUM On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) r
CVE-2026-73465 6.3 MEDIUM On affected platforms running Arista EOS, under certain circumstances plaintext private ke
CVE-2026-73467 6.3 MEDIUM On affected platforms running Arista EOS, under certain circumstances plaintext shared sec
CVE-2026-73460 6.1 MEDIUM Security Advisory 0160
CVE-2026-19641 5.3 MEDIUM On affected platforms running Arista EOS with password authentication configured, a specia
CVE-2026-73451 4.8 MEDIUM On affected platforms running Arista EOS with dual switch cards and with ingress Security
CVE-2026-73444 4.7 MEDIUM On affected platforms running Arista EOS with VRRPv2 IP Authentication Header (IP-AH) auth

IV. Related Vulnerabilities

Same product: EOS
Same vendor: Arista Networks
Same weakness: CWE-532

V. Comments for CVE-2026-73466

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