CVE-2025-2826

ACL bypass via incorrect ingress policy enforcement

Published May 27, 2025 · Updated May 28, 2025

Access-control failure in Arista EOS 4.33.2F allows remote authenticated users to bypass ingress ACLs with adjacent traffic. On 7060X6 switches, EOS misapplies IPv4, MAC, or standard IPv6 ingress ACLs across multiple Ethernet interfaces or LAGs, permitting denied packets or dropping permitted packets. Exposure requires an affected ACL to be configured and active on multiple Ethernet interfaces or at least one LAG; reported impact is limited to incorrect packet filtering.

CVSS severity2.6
Low
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access-control failure in Arista EOS 4.33.2F allows remote authenticated users to bypass ingress ACLs with adjacent traffic. On 7060X6 switches, EOS misapplies IPv4, MAC, or standard IPv6 ingress ACLs across multiple Ethernet interfaces or LAGs, permitting denied packets or dropping permitted packets. Exposure requires an affected ACL to be configured and active on multiple Ethernet interfaces or at least one LAG; reported impact is limited to incorrect packet filtering.

The record

CVE
CVE-2025-2826
Published
May 27, 2025
Updated
May 28, 2025
Vendor
Arista Networks
Product
Arista EOS
Classifications
CWE-1284, T1599
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2025CVE publishedPublication date reported by the CVE source.
  2. May 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.33.2F

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Arista Networks · Arista EOSversion=4.33.2F

Published CVSS scores

2.6Arista Networks, Inc.CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1284Improper Validation of Specified Quantity in Input
T1599Network Boundary Bridging

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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