{ "document": { "acknowledgments": [ { "names": [ "Van1sher" ] }, { "names": [ "Max Toor with Microsoft" ] } ], "aggregate_severity": { "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Public", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en-US", "notes": [ { "category": "general", "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle", "title": "Additional Resources" }, { "category": "legal_disclaimer", "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.", "title": "Disclaimer" }, { "category": "general", "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.", "title": "Customer Action" } ], "publisher": { "category": "vendor", "contact_details": "secure@microsoft.com", "name": "Microsoft Security Response Center", "namespace": "https://msrc.microsoft.com" }, "references": [ { "category": "self", "summary": "CVE-2026-62913 Microsoft Exchange Server Remote Code Execution Vulnerability - HTML", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62913" }, { "category": "self", "summary": "CVE-2026-62913 Microsoft Exchange Server Remote Code Execution Vulnerability - CSAF", "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-62913.json" }, { "category": "external", "summary": "Microsoft Exploitability Index", "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1" }, { "category": "external", "summary": "Microsoft Support Lifecycle", "url": "https://support.microsoft.com/lifecycle" }, { "category": "external", "summary": "Common Vulnerability Scoring System", "url": "https://www.first.org/cvss" } ], "title": "Microsoft Exchange Server Remote Code Execution Vulnerability", "tracking": { "current_release_date": "2026-08-13T07:00:00.000Z", "generator": { "date": "2026-08-28T01:58:58.557Z", "engine": { "name": "MSRC Generator", "version": "1.0" } }, "id": "msrc_CVE-2026-62913", "initial_release_date": "2026-08-11T07:00:00.000Z", "revision_history": [ { "date": "2026-08-11T07:00:00.000Z", "legacy_version": "1", "number": "1", "summary": "Information published." }, { "date": "2026-08-12T07:00:00.000Z", "legacy_version": "1.1", "number": "2", "summary": "Updated an acknowledgement. This is an informational change only." }, { "date": "2026-08-13T07:00:00.000Z", "legacy_version": "1.2", "number": "3", "summary": "Added acknowledgements. This is an informational change only." } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "<15.01.2507.072", "product": { "name": "Microsoft Exchange Server 2016 Cumulative Update 23 <15.01.2507.072", "product_id": "4" } }, { "category": "product_version", "name": "15.01.2507.072", "product": { "name": "Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.072", "product_id": "12039" } } ], "category": "product_name", "name": "Microsoft Exchange Server 2016 Cumulative Update 23" }, { "branches": [ { "category": "product_version_range", "name": "<15.02.2562.046", "product": { "name": "Microsoft Exchange Server Subscription Edition RTM <15.02.2562.046", "product_id": "1" } }, { "category": "product_version", "name": "15.02.2562.046", "product": { "name": "Microsoft Exchange Server Subscription Edition RTM 15.02.2562.046", "product_id": "16792" } } ], "category": "product_name", "name": "Microsoft Exchange Server Subscription Edition RTM" }, { "branches": [ { "category": "product_version_range", "name": "<15.02.1748.049", "product": { "name": "Microsoft Exchange Server 2019 Cumulative Update 15 <15.02.1748.049", "product_id": "2" } }, { "category": "product_version", "name": "15.02.1748.049", "product": { "name": "Microsoft Exchange Server 2019 Cumulative Update 15 15.02.1748.049", "product_id": "12502" } } ], "category": "product_name", "name": "Microsoft Exchange Server 2019 Cumulative Update 15" }, { "branches": [ { "category": "product_version_range", "name": "<15.02.1544.044", "product": { "name": "Microsoft Exchange Server 2019 Cumulative Update 14 <15.02.1544.044", "product_id": "3" } }, { "category": "product_version", "name": "15.02.1544.044", "product": { "name": "Microsoft Exchange Server 2019 Cumulative Update 14 15.02.1544.044", "product_id": "12293" } } ], "category": "product_name", "name": "Microsoft Exchange Server 2019 Cumulative Update 14" } ], "category": "vendor", "name": "Microsoft" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-62913", "cwe": { "id": "CWE-122", "name": "Heap-based Buffer Overflow" }, "notes": [ { "category": "general", "text": "Microsoft", "title": "Assigning CNA" }, { "category": "faq", "text": "An authenticated attacker could exploit this vulnerability by sending a specially crafted request to an affected service over the network. Successful exploitation could allow the attacker to execute code on the target system.", "title": "How could an attacker exploit this vulnerability?" } ], "product_status": { "fixed": [ "12039", "12293", "12502", "16792" ], "known_affected": [ "1", "2", "3", "4" ] }, "references": [ { "category": "self", "summary": "CVE-2026-62913 Microsoft Exchange Server Remote Code Execution Vulnerability - HTML", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62913" }, { "category": "self", "summary": "CVE-2026-62913 Microsoft Exchange Server Remote Code Execution Vulnerability - CSAF", "url": "https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-62913.json" } ], "remediations": [ { "category": "vendor_fix", "date": "2026-08-11T07:00:00.000Z", "details": "15.01.2507.072:Security Update:https://support.microsoft.com/help/5121576", "product_ids": [ "4" ], "url": "https://support.microsoft.com/help/5121576" }, { "category": "vendor_fix", "date": "2026-08-11T07:00:00.000Z", "details": "15.02.2562.046:Security Update:https://support.microsoft.com/help/5121573", "product_ids": [ "1" ], "url": "https://support.microsoft.com/help/5121573" }, { "category": "vendor_fix", "date": "2026-08-11T07:00:00.000Z", "details": "15.02.1748.049:Security Update:https://support.microsoft.com/help/5121574", "product_ids": [ "2" ], "url": "https://support.microsoft.com/help/5121574" }, { "category": "vendor_fix", "date": "2026-08-11T07:00:00.000Z", "details": "15.02.1544.044:Security Update:https://support.microsoft.com/help/5121575", "product_ids": [ "3" ], "url": "https://support.microsoft.com/help/5121575" } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "exploitCodeMaturity": "UNPROVEN", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "remediationLevel": "OFFICIAL_FIX", "reportConfidence": "CONFIRMED", "scope": "UNCHANGED", "temporalScore": 7.7, "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C", "version": "3.1" }, "products": [ "1", "2", "3", "4" ] } ], "threats": [ { "category": "impact", "details": "Remote Code Execution" }, { "category": "exploit_status", "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely" } ], "title": "Microsoft Exchange Server Remote Code Execution Vulnerability" } ] }