CVE-2026-19641 — MEDIUM (5.3)

Vulnerability 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.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

LOW

Related Weaknesses (CWE)

CWE-116

References

https://www.arista.com/en/support/advisories-notices/security-advisory/24708-sec

FAQ

What is CVE-2026-19641?

CVE-2026-19641 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 exhaus...

How severe is CVE-2026-19641?

CVE-2026-19641 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-19641?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.