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TI-2021-09567 Aliases CVE-2021-28452GHSA-8499-m9hr-266h

Microsoft Outlook Memory Corruption Vulnerability

Priority LOW 37CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Microsoft Outlook Memory Corruption Vulnerability

Why it matters now

EPSS 0.01384 72nd percentileScored 2026-11-07
Fix Fixed Microsoft Office 2019 (Microsoft): https://aka.ms/OfficeSecurityReleasesMicrosoft 365 Apps for Enterprise (Microsoft): https://aka.ms/OfficeSecurityReleases+3 more products

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Office 201919.0.0 to before https://aka.ms/OfficeSecurityReleaseshttps://aka.ms/OfficeSecurityReleasesPatch availableCNA
MicrosoftMicrosoft 365 Apps for Enterprise16.0.1 to before https://aka.ms/OfficeSecurityReleaseshttps://aka.ms/OfficeSecurityReleasesPatch availableCNA
MicrosoftMicrosoft Outlook 201616.0.0.0 to before publicationpublicationPatch availableCNA
MicrosoftMicrosoft Outlook 2013 Service Pack 115.0.0.0 to before publicationpublicationPatch availableCNA
MicrosoftMicrosoft Outlook 2010 Service Pack 213.0.0.0 to before publicationpublicationPatch availableCNA
  • Microsoft Office 2019 VendorMicrosoft Affected 19.0.0 to before https://aka.ms/OfficeSecurityReleases Fixed in https://aka.ms/OfficeSecurityReleases Patch available CNA
  • Microsoft 365 Apps for Enterprise VendorMicrosoft Affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases Fixed in https://aka.ms/OfficeSecurityReleases Patch available CNA
  • Microsoft Outlook 2016 VendorMicrosoft Affected 16.0.0.0 to before publication Fixed in publication Patch available CNA
  • Microsoft Outlook 2013 Service Pack 1 VendorMicrosoft Affected 15.0.0.0 to before publication Fixed in publication Patch available CNA
  • Microsoft Outlook 2010 Service Pack 2 VendorMicrosoft Affected 13.0.0.0 to before publication Fixed in publication Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:365_apps:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:a:microsoft:office:2019:*:*:*:*:-:*:*2019VulnerableMicrosoft
cpe:2.3:a:microsoft:outlook:2010:sp2:*:*:*:*:*:*2010 sp2VulnerableMicrosoft
cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:-:*:*:*2013 sp1VulnerableMicrosoft
cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:rt:*:*:*2013 sp1VulnerableMicrosoft
cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:*2016VulnerableMicrosoft
  • cpe:2.3:a:microsoft:365_apps:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:office:2019:*:*:*:*:-:*:* Versions 2019 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:outlook:2010:sp2:*:*:*:*:*:* Versions 2010 sp2 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:-:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:rt:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:* Versions 2016 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft Office 2019 (Microsoft) Fixed in https://aka.ms/OfficeSecurityReleases
  • Fix · CNA Microsoft 365 Apps for Enterprise (Microsoft) Fixed in https://aka.ms/OfficeSecurityReleases
  • Fix · CNA Microsoft Outlook 2016 (Microsoft) Fixed in publication
  • Fix · CNA Microsoft Outlook 2013 Service Pack 1 (Microsoft) Fixed in publication
  • Fix · CNA Microsoft Outlook 2010 Service Pack 2 (Microsoft) Fixed in publication

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-28452
  2. 2026-10-03 Alias added: GHSA-8499-m9hr-266h

References

Patch 1

  • TI-2024-14173 Microsoft Outlook Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-09240 Microsoft Outlook Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-25471 Microsoft Project Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2023-17652 Microsoft Outlook Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2026-17368 Microsoft Word Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 7.8
  • TI-2026-17363 Microsoft Office Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 7.8
See all 935 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences