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EOS — Vulnerabilities & Security Advisories 78

All 78 CVE vulnerabilities found in EOS, with AI-generated Chinese analysis, references, and POCs.

This vulnerability aggregation page documents known security defects in the EOS product line, categorized by specific weakness types and associated vendor advisories. The collection aggregates reported issues across the product's release history, covering the full timeframe from initial deployment through the latest patch cycles. Here you can track the vendor's advisory timeline, analyze the frequency and severity of specific flaw classes, and review the complete vulnerability history for EOS to identify recurring themes in code quality or update cadence.

Vendor: Arista Networks

CVE ID Title CVSS Severity Published
CVE-2026-73458 On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection (BFD) sessions configured, a specially crafted packet can cause the BFD session(s) to go down. This may result in undesirable network changes because various rou CWE-303 8.2 High 2026-09-15
CVE-2026-73467 On affected platforms running Arista EOS, under certain circumstances plaintext shared secrets for configured Terminal Access Controller Access-Control System Plus (TACACS+) servers CWE-532 6.3 Medium 2026-09-15
CVE-2026-73466 On affected platforms running Arista EOS, under certain circumstances plaintext user passwords CWE-532 6.3 Medium 2026-09-15
CVE-2026-73465 On affected platforms running Arista EOS, under certain circumstances plaintext private keys CWE-532 6.3 Medium 2026-09-15
CVE-2026-19641 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 CWE-116 5.3 Medium 2026-09-15
CVE-2026-73451 On affected platforms running Arista EOS with dual switch cards and with ingress Security ACLs configured on Switched Virtual Interfaces (SVI) in shared mode, restarting of the secondary switchcard forwarding agent or insertion of secondary switchcard, can CWE-1419 4.8 Medium 2026-09-15
CVE-2026-75945 A race condition may cause a supplicant to remain in an authorized state after a clear dot1x host all command is issued. CWE-459 2.6 Low 2026-09-14
CVE-2026-75944 A race condition during supplicant re-authentication may leave a stale ACL entry that persists in the system. If the AclAgent subsequently restarts, this stale entry may be applied to new supplicants, resulting in incorrect access control enforcement. User CWE-459 2.6 Low 2026-09-14
CVE-2026-75943 A brief (milliseconds to seconds) traffic leak may occur when an authenticated supplicant is removed, either via the clear dot1x host all CLI command or due to a supplicant timeout. During this window, the supplicant's traffic may pass without ACL enforcem CWE-459 2.6 Low 2026-09-14
CVE-2026-77191 All of the CVEs covered in this advisory apply to affected platforms running Arista EOS with 802.1X authentication and authorization enabled and Access Control Lists (ACLs) configured for per-supplicant policy enforcement. An authenticated supplicant on an CWE-862 2.6 Low 2026-09-14
CVE-2026-73449 On affected platforms running Arista EOS with both 802.1X port authentication and the RADIUS proxy feature configured with dynamic authorization, a low-privileged attacker on an adjacent network segment who induces a RADIUS packet through a configured RADI CWE-290 5.9 Medium 2026-09-14
CVE-2026-2379 Arista EOS IPsec Tunnel Sequence Number Mismatch via Interface Flaps when Anti-Replay is Disabled CWE-672 5.9 Medium 2026-06-05
CVE-2026-7473 Arista EOS Unexpected Tunnel Protocol Decapsulation and Forwarding Bypass CWE-1023 5.8 Medium 2026-06-05
CVE-2025-8873 Arista EOS Dataplane Denial of Service via Malformed IPsec Packet CWE-1286 7.5 High 2026-06-04
CVE-2023-5502 On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, a malicious supplicant may bypass authentication. CWE-287 5.9 Medium 2026-06-04
CVE-2024-27892 On affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request can be run when it should have been rejected (SSL Profiles Enabled). CWE-306 9.6 Critical 2026-06-04
CVE-2024-27890 On affected platforms running Arista EOS with OpenConfig configured, a gNMI Set request can be run when it should have been rejected (No SSL Profiles Enabled). CWE-306 9.6 Critical 2026-06-04
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. CWE-284 5.3 Medium 2026-06-04
CVE-2024-6858 In Arista’s EOS when in 802.1X mode, multi-auth unauthenticated hosts might be allowed access to a switch port if there exists an EAPOL capable device in the fallback VLAN. CWE-1287 - - 2026-06-04
CVE-2025-7048 On affected platforms running Arista EOS with MACsec configuration, a specially crafted packet can cause the MACsec process to terminate unexpectedly. Continuous receipt of these packets with certain MACsec configurations can cause longer term disruption o CWE-805 4.3 Medium 2026-01-06
CVE-2025-8872 A specially crafted packet can cause the OSFPv3 process to have high CPU utilization which may result in the OSFPv3 process being restarted CWE-400 6.5 Medium 2025-12-16
CVE-2025-8870 On affected platforms running Arista EOS, certain serial console input might result in an unexpected reload of the device. CWE-248 4.9 Medium 2025-11-14
CVE-2025-6188 On affected platforms running Arista EOS, maliciously formed UDP packets with source port 3503 may be accepted by EOS. UDP Port 3503 is associated with LspPing Echo Reply. This can result in unexpected behaviors, especially for UDP based services that do n 7.5 High 2025-08-25
CVE-2025-3456 On affected platforms running Arista EOS, the global common encryption key configuration may be logged in clear text, in local or remote accounting logs. Knowledge of both the encryption key and protocol specific encrypted secrets from the device running-c CWE-532 3.8 Low 2025-08-25
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. CWE-1284 2.6 Low 2025-05-27
CVE-2025-2796 On affected platforms with hardware IPSec support running Arista EOS with IPsec enabled and anti-replay protection configured, EOS may exhibit unexpected behavior in specific cases. Received duplicate encrypted packets, which should be dropped under normal 5.3 Medium 2025-05-27
CVE-2024-11185 On affected platforms running Arista EOS, ingress traffic on Layer 2 ports may, under certain conditions, be improperly forwarded to ports associated with different VLANs, resulting in a breach of VLAN isolation and segmentation boundaries. 6.5 Medium 2025-05-27
CVE-2024-9448 On affected platforms running Arista EOS with Traffic Policies configured the vulnerability will cause received untagged packets not to hit Traffic Policy rules that they are expected to hit. If the rule was to drop the packet, the packet will not be dropp CWE-1284 7.5 High 2025-05-08
CVE-2025-0936 On affected platforms running Arista EOS with a gNMI transport enabled, running the gNOI File TransferToRemote RPC with credentials for a remote server may cause these remote-server credentials to be logged or accounted on the local EOS device or possibly CWE-256 6.5 Medium 2025-05-07
CVE-2024-8000 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 CWE-1284 5.3 Medium 2025-03-04

All 78 known CVE vulnerabilities affecting EOS with full Chinese analysis, references, and POCs where available.