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CVE-2026-19655

EOS · Vulnerability

CVSS 3.1 6.5 MEDIUMCVSS 4.0 7.1 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-19655

Published

On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) relay/snooping configured with the information option (Option 82), or with the DHCP server configured with match criteria based on the information option, an unauthenticated attacker connected to a client-facing VLAN(s) where the relay is configured can send a specially crafted packet that causes the DHCP Relay service to restart.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-19655

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",
                    "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"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "4.35.0",
                            "lessThanOrEqual": "4.35.5M",
                            "changes": [
                                {
                                    "at": "4.35.6M",
                                    "status": "unaffected"
                                }
                            ],
                            "versionType": "custom"
                        },
                        {
                            "status": "affected",
                            "version": "4.34.0",
                            "lessThanOrEqual": "4.34.7.1M",
                            "changes": [
                                {
                                    "at": "4.34.8M",
                                    "status": "unaffected"
                                }
                            ],
                            "versionType": "custom"
                        },
                        {
                            "status": "affected",
                            "version": "4.33.0",
                            "lessThanOrEqual": "4.33.9M",
                            "changes": [
                                {
                                    "at": "4.33.10M",
                                    "status": "unaffected"
                                }
                            ],
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

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