# CVE-2026-19641

## Summary

- **CVE ID:** CVE-2026-19641
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (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)
- **CWE:** CWE-116
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

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.

## Affected Products

- Arista Networks — EOS (4.36.0)
- Arista Networks — EOS (4.35.0)
- Arista Networks — EOS (4.34.0)
- Arista Networks — EOS (0.0.0)

## References

- [CNA](https://www.arista.com/en/support/advisories-notices/security-advisory/24708-security-advisory-0152)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.34%
- **EPSS Percentile:** 27.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._