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    CVE-2024-27891

    On affected platforms running Arista EOS with MACsec and egress ACLs configured on the same interfaces, the ACL policies may not be enforced for packets egressing on those ports. This can cause outgoing packets to incorrectly be allowed or denied.

    Published:Jun 4, 2026
    Last Modified:Jun 5, 2026
    EPS:Jun 4, 2026
    EPSS Score:0.00125
    CVSS Score:5.3

    Affected Products

    Vendor
    Arista
    Product
    Eos

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

    Related CVEs

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    CVE-2025-8873 (CVSS 8.7) — On affected platforms running Arista EOS with IPsec configured, a specially crafted packet can cause the datap…
    CVE-2023-5502 (CVSS 8.2) — On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, and …
    CVE-2024-27892 (CVSS 7.2) — Affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request can be run when it should…
    CVE-2024-27890 (CVSS 7.2) — Affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request can be run when it should…
    CVE-2024-6858 (CVSS 6.5) — In Arista’s EOS when in 802.1X mode, multi-auth unauthenticated hosts might be allowed access to a switch port…
    CVE-2025-7048 (CVSS 5.3) — On affected platforms running Arista EOS with MACsec configuration, a specially crafted packet can cause the M…
    CVE-2025-8872 (CVSS 7.1) — On affected platforms running Arista EOS with OSPFv3 configured, a specially crafted packet can cause the OSFP…
    CVE-2025-8870 (CVSS 5.6) — On affected platforms running Arista EOS, certain serial console input might result in an unexpected reload of…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High