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Vulnerability details

CVE-2026-70096

Microsoft 365 Apps for EnterpriseMicrosoft Office 365 for MacMicrosoft Office LTSCMicrosoft Office LTSC for MacMicrosoft Windows 10Microsoft Windows 11

Windows Rich Text Edit Control Remote Code Execution Vulnerability

CVSS 3.1
9.8Critical

Official description

Heap-based buffer overflow in Windows Rich Text Edit Control allows an unauthorized attacker to execute code over a network.

CVSS scores

ScoreVersionSourceVector
9.8Critical 3.1 CVEProject cvelistV5 (CNA) (microsoft) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected products

VendorProductVersionsSource
Microsoft Microsoft 365 Apps for Enterprise 16.0.1 ≤ v < https://aka.ms/OfficeSecurityReleases CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office 365 for Mac 1.0.0 ≤ v < 16.114.26101123 CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office LTSC 2021 16.0.1 ≤ v < 16.0.14334.20974 CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office LTSC 2024 16.0.0 ≤ v < 16.0.17932.21056 CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office LTSC for Mac 2021 16.0.1 ≤ v < 16.114.26101123 CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office LTSC for Mac 2024 16.0.0 ≤ v < 16.114.26101123 CVEProject cvelistV5 (CNA)
Microsoft Windows 10 Version 1607 10.0.14393.0 ≤ v < 10.0.14393.9612 CVEProject cvelistV5 (CNA)
Microsoft Windows 10 Version 1809 10.0.17763.0 ≤ v < 10.0.17763.9376 CVEProject cvelistV5 (CNA)
Microsoft Windows 10 Version 21H2 10.0.19044.0 ≤ v < 10.0.19044.7807 CVEProject cvelistV5 (CNA)
Microsoft Windows 10 Version 22H2 10.0.19045.0 ≤ v < 10.0.19045.7807 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 Version 24H2 10.0.26100.0 ≤ v < 10.0.26100.9711 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 Version 25H2 10.0.26200.0 ≤ v < 10.0.26200.9711 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 Version 26H2 10.0.26300.0 ≤ v < 10.0.26300.9711 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 version 23H2 10.0.22631.0 ≤ v < 10.0.22631.7652 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 version 23H2 10.0.22631.0 ≤ v < 10.0.22631.7652 CVEProject cvelistV5 (CNA)
Microsoft Windows 11 version 26H1 10.0.28000.0 ≤ v < 10.0.28000.3231 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2012 6.2.9200.0 ≤ v < 6.2.9200.26434 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 ≤ v < 6.2.9200.26434 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2012 R2 6.3.9600.0 ≤ v < 6.3.9600.23470 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 ≤ v < 6.3.9600.23470 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2016 10.0.14393.0 ≤ v < 10.0.14393.9612 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 ≤ v < 10.0.14393.9612 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2019 10.0.17763.0 ≤ v < 10.0.17763.9376 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 ≤ v < 10.0.17763.9376 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2022 10.0.20348.0 ≤ v < 10.0.20348.5761 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2025 10.0.26100.0 ≤ v < 10.0.26100.33650 CVEProject cvelistV5 (CNA)
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 ≤ v < 10.0.26100.33650 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-10-13
Last updated
2026-10-31
State
Published
Assigner (CNA)
microsoft
Kolun priority
41 · Medium

Exploit prediction (EPSS)

1.08%
Probability of exploitation in 30 days
65.4%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-122
    Heap-based Buffer Overflow