CVE-2026-55007Published

Microsoft Exchange Server Remote Code Execution Vulnerability

Exact source revision recorded 30 Oct 2026 22:45:26 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-55007

Published

Microsoft Exchange Server 2019 Cumulative Update 14

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Microsoft",
                    "product": "Microsoft Exchange Server 2019 Cumulative Update 14",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "15.02.0.0",
                            "lessThan": "15.02.1544.046",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Microsoft Exchange Server 2019 Cumulative Update 15

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Microsoft",
                    "product": "Microsoft Exchange Server 2019 Cumulative Update 15",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "15.02.0.0",
                            "lessThan": "15.02.1748.051",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

Microsoft Exchange Server Subscription Edition RTM

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Microsoft",
                    "product": "Microsoft Exchange Server Subscription Edition RTM",
                    "platforms": [
                        "x64-based Systems"
                    ],
                    "versions": [
                        {
                            "version": "15.02.0.0",
                            "lessThan": "15.02.2562.049",
                            "versionType": "custom",
                            "status": "affected"
                        }
                    ]
                }

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