{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-45583: Microsoft Exchange Server Remote Code Execution Vulnerability","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-45583","status":"final","version":"1","initial_release_date":"2026-06-09T17:04:47.793Z","current_release_date":"2026-06-10T17:53:37.687Z","revision_history":[{"date":"2026-06-09T17:04:47.793Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-45583 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-45583"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-45583"},{"category":"external","summary":"Microsoft Exchange Server Remote Code Execution Vulnerability","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45583"}]},"product_tree":{"branches":[{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Microsoft Exchange Server 2016 Cumulative Update 23","branches":[{"category":"product_version_range","name":">=15.01.0.0 <15.01.2507.069","product":{"name":"Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 >=15.01.0.0 <15.01.2507.069","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:microsoft_exchange_server_2016_cumulative_update_23:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Microsoft Exchange Server 2019 Cumulative Update 14","branches":[{"category":"product_version_range","name":">=15.02.0.0 <15.02.1544.041","product":{"name":"Microsoft Microsoft Exchange Server 2019 Cumulative Update 14 >=15.02.0.0 <15.02.1544.041","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:microsoft_exchange_server_2019_cumulative_update_14:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Microsoft Exchange Server 2019 Cumulative Update 15","branches":[{"category":"product_version_range","name":">=15.02.0.0 <15.02.1748.046","product":{"name":"Microsoft Microsoft Exchange Server 2019 Cumulative Update 15 >=15.02.0.0 <15.02.1748.046","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:microsoft_exchange_server_2019_cumulative_update_15:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Microsoft","branches":[{"category":"product_name","name":"Microsoft Exchange Server Subscription Edition RTM","branches":[{"category":"product_version_range","name":">=15.02.0.0 <15.02.2562.043","product":{"name":"Microsoft Microsoft Exchange Server Subscription Edition RTM >=15.02.0.0 <15.02.2562.043","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:microsoft:microsoft_exchange_server_subscription_edition_rtm:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-45583","title":"Microsoft Exchange Server Remote Code Execution Vulnerability","notes":[{"category":"description","text":"Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","baseScore":7.5,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 15.01.2507.069, 15.02.1544.041, 15.02.1748.046, 15.02.2562.043.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45583"}]}]}