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CVE-2026-19313

Fireware OS Pre-Authentication Heap Buffer Overflow in iked Allows Remote Code Execution

CVSS 4.0 9.3 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-19313

Published

An heap overflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to execute arbitrary code by sending specially crafted network traffic.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-19313

Published

Fireware OS

Vendor product

Publisher's version information

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

{
                    "vendor": "WatchGuard",
                    "product": "Fireware OS",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "2025.0",
                            "versionType": "custom",
                            "lessThan": "2026.2.2"
                        },
                        {
                            "status": "affected",
                            "version": "12.0",
                            "versionType": "custom",
                            "lessThan": "12.12.2"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "platforms": [
                        "Default"
                    ]
                }

Fireware OS

Vendor product

Publisher's version information

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

{
                    "vendor": "WatchGuard",
                    "product": "Fireware OS",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "12.0",
                            "versionType": "custom",
                            "lessThan": "12.5.20"
                        },
                        {
                            "status": "affected",
                            "version": "2026.3",
                            "versionType": "custom",
                            "lessThan": "2026.3.1"
                        }
                    ],
                    "defaultStatus": "unaffected",
                    "platforms": [
                        "T15/T35"
                    ]
                }

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