CVE-2026-19641

published 2026-09-15

CVE-2026-19641: On affected platforms running Arista EOS with password authentication configured, a specially crafted password can create orphan authentication sessions…

Priority P4 34 medium 5.3 CVSS 3.1

AV N AC L PR N UI N S U C N I N A L

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

4 ranges

Vendor	Product	Version range	Fixed in
arista_networks	eos	0.0.0 – 4.33.8M	—
arista_networks	eos	4.34.0 – 4.34.7.1M	—
arista_networks	eos	4.35.0 – 4.35.5M	—
arista_networks	eos	4.36.0 – 4.36.0F	—

CVSS provenance

nvd v3.1 5.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

nvd v4.0 6.9 MEDIUM 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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CWE-116