{"id":"CVE-2026-20943","state":"PUBLISHED","title":"Microsoft Office Click-To-Run Remote Code Execution Vulnerability","description":"Untrusted search path in Microsoft Office allows an unauthorized attacker to execute code locally.","publishedAt":"2026-01-13T17:56:45.424Z","updatedAt":"2026-07-30T20:47:01.567Z","severity":{"score":7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","source":"microsoft"},"assigner":"microsoft","products":["Microsoft Microsoft Office 2016","Microsoft Microsoft Office Deployment Tool","Microsoft Microsoft SharePoint Enterprise Server 2016","Microsoft Microsoft SharePoint Server 2019","Microsoft Microsoft SharePoint Server Subscription Edition"],"affected":[{"vendor":"Microsoft","product":"Microsoft Office 2016","versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.5535.1000","versionType":"custom"}],"platforms":["32-bit Systems","x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft Office Deployment Tool","versions":[{"version":"1.0","status":"affected","lessThan":"16.0.19426.20170","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft SharePoint Enterprise Server 2016","versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.5535.1001","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft SharePoint Server 2019","versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.10417.20083","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft SharePoint Server Subscription Edition","versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.19127.20442","versionType":"custom"}],"platforms":["x64-based Systems"]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20943"],"weaknesses":["CWE-426"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/20xxx/CVE-2026-20943.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20943","state":"PUBLISHED","datePublished":"2026-01-13T17:56:45.424Z","dateUpdated":"2026-07-30T20:47:01.567Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2025-12-04T20:04:16.338Z"},"containers":{"cna":{"title":"Microsoft Office Click-To-Run Remote Code Execution Vulnerability","descriptions":[{"lang":"en-US","value":"Untrusted search path in Microsoft Office allows an unauthorized attacker to execute code locally."}],"affected":[{"vendor":"Microsoft","product":"Microsoft Office 2016","versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.5535.1000","versionType":"custom"}],"platforms":["32-bit Systems","x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft Office Deployment Tool","versions":[{"version":"1.0","status":"affected","lessThan":"16.0.19426.20170","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft SharePoint Enterprise Server 2016","versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.5535.1001","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft SharePoint Server 2019","versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.10417.20083","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Microsoft SharePoint Server Subscription Edition","versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.19127.20442","versionType":"custom"}],"platforms":["x64-based Systems"]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20943","name":"Microsoft Office Click-To-Run Remote Code Execution Vulnerability","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"HIGH","baseScore":7,"vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-426","description":"CWE-426: Untrusted Search Path","lang":"en-US","type":"CWE"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2026-07-30T20:47:01.567Z"},"datePublic":"2026-01-13T16:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sharepoint_server_2019:*:*:*:*:*:*:*:*","versionStartIncluding":"16.0.0","versionEndExcluding":"16.0.10417.20083"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:office_2016:*:*:*:*:*:*:x86:*","versionStartIncluding":"16.0.0","versionEndExcluding":"16.0.5535.1000"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sharepoint_server_2016:*:*:*:*:enterprise:*:*:*","versionStartIncluding":"16.0.0","versionEndExcluding":"16.0.5535.1001"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*","versionStartIncluding":"16.0.0","versionEndExcluding":"16.0.19127.20442"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:office:*:*:Deployment_Tool:*:*:*:*:*","versionStartIncluding":"1.0","versionEndExcluding":"16.0.19426.20170"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-20943","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-01-14T04:56:10.239259Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-26T15:04:27.987Z"}}]}}}