EUVD-2026-79141
GHSA-rxmx-2jm2-79fq
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding for downstream
|
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Alert meAnalysisAIv1 – Sep 16, 2026
Arista EOS devices with password-based authentication enabled can accumulate orphan authentication sessions when a specially crafted password string is submitted to the management login path. Repeatedly sending such passwords exhausts the device's authentication resources, so legitimate administrators are locked out of the switch. Arista discovered the flaw internally and states it has no evidence of malicious exploitation in customer networks; no public exploit code or CISA KEV listing was identified in the supplied intelligence. The vendor-rated CVSS 4.0 score is 6.9 with availability-only impact.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Primary rating from Vendor (Arista) · only source for this CVE.
CVSS VectorVendor: Arista
Lifecycle Timeline
1DescriptionCVE.org
On affected platforms running Arista EOS with password authentication configured, a specially crafted password can create orphan authentication sessions. Repeated exploitation of this issue can exhaust available authentication resources, resulting in legitimate users being unable to log in to the device.
This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
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Exploit-DB