CVE-2025-2826

n affected platforms running Arista EOS, ACL policies may not be enforced. IPv4 ingress ACL, MAC ingress ACL, or IPv6 standard ingress ACL enabled on one or more ethernet or LAG interfaces may result in ACL policies not being enforced for ingress packets.

Description

n affected platforms running Arista EOS, ACL policies may not be enforced. IPv4 ingress ACL, MAC ingress ACL, or IPv6 standard ingress ACL enabled on one or more ethernet or LAG interfaces may result in ACL policies not being enforced for ingress packets. This can cause incoming packets to incorrectly be allowed or denied. The two symptoms of this issue on the affected release and platform are: * Packets which should be permitted may be dropped and, * Packets which should be dropped may be permitted.

Remediation

Solution:

  • The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades CVE-2025-2826 has been fixed in the following releases: * 4.33.2.1F, 4.33.3F and later releases in the 4.33.x train

Workaround:

  • No workaround is available. Ingress ACLs may be applied as egress, if resources permit and the policy is applicable.

Category

2.6
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.02%
Affected: Arista Networks EOS
Published at:
Updated at:

References

Link Tags
https://www.arista.com/en/support/advisories-notices/security-advisory/21414-security-advisory-0120

Frequently Asked Questions

What is the severity of CVE-2025-2826?
CVE-2025-2826 has been scored as a low severity vulnerability.
How to fix CVE-2025-2826?
To fix CVE-2025-2826: The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades CVE-2025-2826 has been fixed in the following releases: * 4.33.2.1F, 4.33.3F and later releases in the 4.33.x train
Is CVE-2025-2826 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-2826 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-2826?
CVE-2025-2826 affects Arista Networks EOS.
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