{"id":"CVE-2026-62912","state":"PUBLISHED","title":"Microsoft Exchange Server Denial of Service Vulnerability","description":"Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service over a network.","publishedAt":"2026-08-11T17:04:44.306Z","updatedAt":"2026-10-30T17:20:30.991Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","source":"microsoft"},"assigner":"microsoft","products":["Microsoft Microsoft Exchange Server 2016 Cumulative Update 23","Microsoft Microsoft Exchange Server 2019 Cumulative Update 14","Microsoft Microsoft Exchange Server 2019 Cumulative Update 15","Microsoft Microsoft Exchange Server Subscription Edition RTM"],"affected":[{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 23","versions":[{"version":"15.01.0.0","status":"affected","lessThan":"15.01.2507.072","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 14","versions":[{"version":"15.02.0.0","status":"affected","lessThan":"15.02.1544.044","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 15","versions":[{"version":"15.02.0.0","status":"affected","lessThan":"15.02.1748.049","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server Subscription Edition RTM","versions":[{"version":"15.02.0.0","status":"affected","lessThan":"15.02.2562.046","versionType":"custom"}],"platforms":["x64-based Systems"]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62912"],"weaknesses":["CWE-502"],"ingestedAt":"2026-10-30T17:32:04.633Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/62xxx/CVE-2026-62912.json","commit":"3341b8c15da9d44519feb86e18f02f360209d08a","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-62912","state":"PUBLISHED","datePublished":"2026-08-11T17:04:44.306Z","dateUpdated":"2026-10-30T17:20:30.991Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2026-07-14T21:25:21.036Z"},"containers":{"cna":{"title":"Microsoft Exchange Server Denial of Service Vulnerability","descriptions":[{"lang":"en-US","value":"Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service over a network."}],"affected":[{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 23","versions":[{"version":"15.01.0.0","status":"affected","lessThan":"15.01.2507.072","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 14","versions":[{"version":"15.02.0.0","status":"affected","lessThan":"15.02.1544.044","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 15","versions":[{"version":"15.02.0.0","status":"affected","lessThan":"15.02.1748.049","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server Subscription Edition RTM","versions":[{"version":"15.02.0.0","status":"affected","lessThan":"15.02.2562.046","versionType":"custom"}],"platforms":["x64-based Systems"]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62912","name":"Microsoft Exchange Server Denial of Service Vulnerability","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"MEDIUM","baseScore":6.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-502","description":"CWE-502: Deserialization of Untrusted Data","lang":"en-US","type":"CWE"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2026-10-30T17:20:30.991Z"},"datePublic":"2026-08-11T14:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:exchange_server_se:*:RTM:*:*:*:*:*:*","versionStartIncluding":"15.02.0.0","versionEndExcluding":"15.02.2562.046"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_15:*:*:*:*:*:*","versionStartIncluding":"15.02.0.0","versionEndExcluding":"15.02.1748.049"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:exchange_server_2016:*:cumulative_update_23:*:*:*:*:*:*","versionStartIncluding":"15.01.0.0","versionEndExcluding":"15.01.2507.072"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:exchange_server_2019:*:cumulative_update_14:*:*:*:*:*:*","versionStartIncluding":"15.02.0.0","versionEndExcluding":"15.02.1544.044"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-12T13:26:37.523780Z","id":"CVE-2026-62912","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-12T13:26:53.371Z"}}]}}}