CVE-2026-62911

{"id": "CVE-2026-62911", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-62911", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-06T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.0, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.1}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"vendor": "Microsoft", "product": "Microsoft Exchange Server 2016 Cumulative Update 23", "versions": [{"status": "affected", "version": "15.01.0.0", "lessThan": "15.01.2507.072", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft Exchange Server 2019 Cumulative Update 14", "versions": [{"status": "affected", "version": "15.02.0.0", "lessThan": "15.02.1544.044", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft Exchange Server 2019 Cumulative Update 15", "versions": [{"status": "affected", "version": "15.02.0.0", "lessThan": "15.02.1748.049", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft Exchange Server Subscription Edition RTM", "versions": [{"status": "affected", "version": "15.02.0.0", "lessThan": "15.02.2562.046", "versionType": "custom"}], "platforms": ["x64-based Systems"]}]}], "published": "2026-08-11T17:18:45.073", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62911", "tags": ["Patch", "Vendor Advisory"], "source": "secure@microsoft.com"}, {"url": "https://github.com/hypnguyen1209/CVE-2026-62911", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-294"}]}], "descriptions": [{"lang": "en", "value": "Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network."}, {"lang": "es", "value": "Omisi\u00f3n de autenticaci\u00f3n mediante captura-repetici\u00f3n en Microsoft Exchange Server permite a un atacante autorizado elevar privilegios sobre una red."}], "lastModified": "2026-10-14T22:10:00.210", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8039FBA1-73D4-4FF2-B183-0DCC961CBFF7"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "56728785-188C-470A-9692-E6C7235109CA"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_10:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "63E362CB-CF75-4B7E-A4B1-D6D84AFCBB68"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_11:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9BE04790-85A2-4078-88CE-1787BC5172E7"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_12:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CCF101BE-27FD-4E2D-A694-C606BD3D1ED7"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_13:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4DF5BDB5-205D-4B64-A49A-0152AFCF4A13"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_14:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "55284CF7-0D04-4216-83FE-4B1F9CA94207"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_15:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CA2CE223-AA49-49E6-AC32-59270EFF55AD"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_16:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4830D6A9-AF74-480C-8F69-8648CD619980"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "079E1E3F-FF25-4B0D-AC98-191D6455A014"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "29805EC7-6403-44B9-91EC-109C087E98EB"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "28FCA0E8-7D27-4746-9731-91B834CA3E64"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "996163E7-6F3F-4D3B-AEA4-62A7F7E1F54D"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "19C1EE0C-B8DD-4B91-BE4B-1C42D72FB718"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3BE427A4-B0C2-4064-8234-29426325C348"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "449CE85B-E599-44D3-A7C1-5133F6A55E86"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FE401B0A-DDE4-4A36-8E27-6DB14E094BE2"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "450319C4-7C8F-43B7-B7F8-80DA4F1F2817"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "23015889-48AF-40A5-862F-290E73A54E77"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4FC34516-D7E7-4AD9-9B45-5474831548E0"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5211792E-5292-41C0-B7E9-8AA63EC606EE"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "075E907F-AF2F-4C31-86C7-51972BE412A1"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_9:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "69AF19DC-3D65-49A8-A85F-511085CDF27B"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "40D8A6DB-9225-4A3F-AD76-192F6CCCF002"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "051DE6C4-7456-4C42-BC51-253208AADB4E"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B4185347-EEDD-4239-9AB3-410E2EC89D2A"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "435343A4-BF10-461A-ABF2-D511A5FBDA75"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_12:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B23C8E3E-5243-4DA6-B9AA-F6053084B55E"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_13:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "583745C7-B802-4CBE-BD88-B5B9AF9B5371"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EE320413-D2C9-4B28-89BF-361B44A3F0FF"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "104F96DC-E280-4E0A-8586-B043B55888C2"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "73B3B3FE-7E85-4B86-A983-2C410FFEF4B8"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8A9FB275-7F17-48B2-B528-BE89309D2AF5"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D4AB3C25-CEA8-4D66-AEE4-953C8B17911A"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "36CE5C6D-9A04-41F5-AE7C-265779833649"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "44ECF39A-1DE1-4870-A494-06A53494338D"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "71CDF29B-116B-4DE2-AFD0-B62477FF0AEB"}, {"criteria": "cpe:2.3:a:microsoft:exchange_server_subscription_edition:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E11586E4-99CF-427F-829F-3365F83F94D5", "versionEndExcluding": "15.02.2562.046"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}