CVE-2026-19641CWE-116

CVE-2026-19641

Medium · published September 15, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
26.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
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
EPSS
0.00343 · 26.5th percentile
Weakness
CWE-116 · Improper Encoding or Escaping of Output
Published
2026-09-15T23:17Z
References (1)
https://www.arista.com/en/support/advisories-notices/security-advisory/24708-security-advisory-0152 · [email protected]
EPSS history
Timeline
  • 17 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 15 SEP 18:17Z
    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 legit
    cvelistv5