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CVE-2026-73463

Security Advisory 0169

CVSS 3.1 5.3 MEDIUMCVSS 4.0 6.0 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-73463

Published

On affected platforms running Arista EOS, when multiple gRPC Network Security Interface (gNSI) transports are configured, a race condition in the gNSI Authz service may cause a policy rotation to fail silently. An authenticated user whose access was revoked by the new policy may retain unauthorized access to gRPC interfaces. This does not affect Bootz. This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-73463

Published

EOS

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Arista Networks",
                    "product": "EOS",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "4.36.0F",
                            "lessThanOrEqual": "4.36.0.1F",
                            "status": "affected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.35.0F",
                            "lessThanOrEqual": "4.35.5M",
                            "status": "affected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.34.0F",
                            "lessThanOrEqual": "4.34.7M",
                            "status": "affected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.33.0F",
                            "lessThanOrEqual": "4.33.8M",
                            "status": "affected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.32.0F",
                            "lessThanOrEqual": "4.32.11M",
                            "status": "affected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.31.0F",
                            "lessThanOrEqual": "4.31.10M",
                            "status": "affected",
                            "versionType": "custom"
                        }
                    ],
                    "platforms": [
                        "710 Series",
                        "720D Series",
                        "720XP/722XPM Series",
                        "750X Series",
                        "7010TX Series",
                        "7020R/R4 Series",
                        "7130 Series running EOS",
                        "7170 Series",
                        "7050X3/X4 Series",
                        "7060X/X2/X4/X5/X6 Series",
                        "7260X/X3 Series",
                        "7280R/R2/R3/R4 Series",
                        "7300X/X3 Series",
                        "7320X Series",
                        "7358X4 Series",
                        "7368X4 Series",
                        "7388X5 Series",
                        "7500R/R2/R3 Series",
                        "7800R3/R4 Series",
                        "7700R4 Series",
                        "AWE 5000 Series",
                        "AWE 7200R Series",
                        "CloudEOS",
                        "cEOS-lab",
                        "vEOS-lab",
                        "CloudVision eXchange, virtual or physical appliance"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON