On affected platforms running Arista EOS with 802.1X configured, certain conditions may occur where a dynamic ACL is received from the AAA server resulting in only the first line of the ACL being installed after an Accelerated Software Upgrade (ASU) restar

published 2025-03-04 last yr. modified 2026-06-17 4mo ago also EUVD-2024-54121

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits: 0; none known

On affected platforms running Arista EOS with 802.1X configured, certain conditions may occur where a dynamic ACL is received from the AAA server resulting in only the first line of the ACL being installed after an Accelerated Software Upgrade (ASU) restart.

Note: supplicants with pending captive-portal authentication during ASU would be impacted with this bug.

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CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: last yr. (2025-03-04)

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

Arista Networks EOS

Classification

Weakness

CWE-1284 Improper Validation of Specified Quantity in Input

References

arista.com /en/support/advisories-notices/security-advisory/21086-security-advisory-0109

Sources

CVE List CVE-2024-8000
NVD CVE-2024-8000

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