Microsoft Excel Remote Code Execution Vulnerability
Priority LOW 38Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
Microsoft Excel Remote Code Execution Vulnerability
Why it matters now
EPSS 0.02181 82nd percentileScored 2026-11-07
Fix Fixed Office Online Server (Microsoft): 16.0.10381.20001Microsoft Office 2019 (Microsoft): https://aka.ms/OfficeSecurityReleases+5 more products
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Office Online Server | https://aka.ms/OfficeSecurityReleases to before 16.0.10381.20001 | 16.0.10381.20001 | Patch available | CNA |
| Microsoft | Microsoft Office 2019 | 19.0.0 to before https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases | Patch available | CNA |
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 to before https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases | Patch available | CNA |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 to before https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases | Patch available | CNA |
| Microsoft | Microsoft Excel 2016 | 16.0.0.0 to before 16.0.5254.1000 | 16.0.5254.1000 | Patch available | CNA |
| Microsoft | Microsoft Excel 2013 Service Pack 1 | 15.0.0.0 to before 15.0.5407.1000 | 15.0.5407.1000 | Patch available | CNA |
| Microsoft | Microsoft Office Web Apps Server 2013 Service Pack 1 | 15.0.1 to before 15.0.5407.1000 | 15.0.5407.1000 | Patch available | CNA |
- Office Online Server VendorMicrosoft Affected https://aka.ms/OfficeSecurityReleases to before 16.0.10381.20001 Fixed in 16.0.10381.20001 Patch available CNA
- 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 Office LTSC 2021 VendorMicrosoft Affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases Fixed in https://aka.ms/OfficeSecurityReleases Patch available CNA
- Microsoft Excel 2016 VendorMicrosoft Affected 16.0.0.0 to before 16.0.5254.1000 Fixed in 16.0.5254.1000 Patch available CNA
- Microsoft Excel 2013 Service Pack 1 VendorMicrosoft Affected 15.0.0.0 to before 15.0.5407.1000 Fixed in 15.0.5407.1000 Patch available CNA
- Microsoft Office Web Apps Server 2013 Service Pack 1 VendorMicrosoft Affected 15.0.1 to before 15.0.5407.1000 Fixed in 15.0.5407.1000 Patch available CNA
CPE configurations NVD · 13
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x64:* | 2013 sp1 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x86:* | 2013 sp1 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:* | 2016 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:* | 2016 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:excel_rt:2013:sp1:*:*:*:*:*:* | 2013 sp1 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:* | 2019 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:* | 2019 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:x64:* | 2021 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x64:* Versions 2013 sp1 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x86:* Versions 2013 sp1 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:* Versions 2016 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:* Versions 2016 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:excel_rt:2013:sp1:*:*:*:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:* Versions 2019 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:* Versions 2019 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:x64:* Versions 2021 Vulnerable ·Microsoft
Show 3 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:x86:* | 2021 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:office_web_apps:2013:sp1:*:*:*:*:*:* | 2013 sp1 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:x86:* Versions 2021 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:office_web_apps:2013:sp1:*:*:*:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
Remediation
- Fix · CNA Office Online Server (Microsoft) Fixed in 16.0.10381.20001
- 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 Office LTSC 2021 (Microsoft) Fixed in https://aka.ms/OfficeSecurityReleases
- Fix · CNA Microsoft Excel 2016 (Microsoft) Fixed in 16.0.5254.1000
- Fix · CNA Microsoft Excel 2013 Service Pack 1 (Microsoft) Fixed in 15.0.5407.1000
- Fix · CNA Microsoft Office Web Apps Server 2013 Service Pack 1 (Microsoft) Fixed in 15.0.5407.1000
Timeline
- 2026-10-02 Threatist record created from CVE-2021-43256
- 2026-10-03 Alias added: GHSA-xf9j-qfgm-f8jm
More Microsoft 365 Apps vulnerabilities
- 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
Sources
- CVE-2021-43256 · CVE Program
- CVE-2021-43256 · NVD
- FIRST EPSS
- GHSA-xf9j-qfgm-f8jm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences