{"id":"CVE-2026-70329","title":"Microsoft Outlook Remote Code Execution Vulnerability","summary":"Integer overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-190"],"vendor":"Microsoft","product":"Microsoft 365 Apps for Enterprise","affected":["365_apps_for_enterprise >= 16.0.1 < https://aka.ms/OfficeSecurityReleases","office_2019 >= 19.0.0 < https://aka.ms/OfficeSecurityReleases","office_ltsc_2021 >= 16.0.1 < https://aka.ms/OfficeSecurityReleases","office_ltsc_2024 >= 16.0.0 < https://aka.ms/OfficeSecurityReleases","outlook_2016 >= 16.0.0.0 < 16.0.5565.1000"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-07T00:00:00+00:00"},"published":"2026-08-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T16:24:58.083Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-70329","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70329","label":"Microsoft Outlook Remote Code Execution Vulnerability"}],"tags":["cve.org"],"epss":0.00669,"epssPercentile":0.50145,"ingestedAt":"2026-09-08T19:08:49.658Z","slug":"CVE-2026-70329","body":"## Overview\n\nInteger overflow or wraparound in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.\n\n## Affected\n\n- `365_apps_for_enterprise >= 16.0.1 < https://aka.ms/OfficeSecurityReleases`\n- `office_2019 >= 19.0.0 < https://aka.ms/OfficeSecurityReleases`\n- `office_ltsc_2021 >= 16.0.1 < https://aka.ms/OfficeSecurityReleases`\n- `office_ltsc_2024 >= 16.0.0 < https://aka.ms/OfficeSecurityReleases`\n- `outlook_2016 >= 16.0.0.0 < 16.0.5565.1000`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}