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."}], "lastModified": "2026-09-02T04:18:00.460", "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": 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