{"id":"CVE-2026-55007","revision":"d4b25a09052544cab4de5de5a371537d","records":[{"revision":"d4b25a09052544cab4de5de5a371537d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-55007","aliases":[],"title":"Microsoft Exchange Server Remote Code Execution Vulnerability","description":"Double free in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.","state":0,"publishedAt":"2026-09-08T17:10:39.617+00:00","modifiedAt":"2026-10-14T23:05:45.613+00:00","affected":[{"ecosystem":"Vendor product","name":"Microsoft Exchange Server 2019 Cumulative Update 14","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft Exchange Server 2019 Cumulative Update 14\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"15.02.0.0\",\n                            \"lessThan\": \"15.02.1544.046\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Microsoft Exchange Server 2019 Cumulative Update 15","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft Exchange Server 2019 Cumulative Update 15\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"15.02.0.0\",\n                            \"lessThan\": \"15.02.1748.051\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Microsoft Exchange Server Subscription Edition RTM","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Microsoft Exchange Server Subscription Edition RTM\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"15.02.0.0\",\n                            \"lessThan\": \"15.02.2562.049\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","score":8.1,"severity":"HIGH"}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55007"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-55007","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-55007","identifiers":["CVE-2026-55007"]},"retained":false,"historicalAffected":[]}],"coverage":[]}