Microsoft SharePoint Server Spoofing Vulnerability
Priority LOW 28Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.
Summary
Microsoft SharePoint Server Spoofing Vulnerability
Why it matters now
EPSS 0.01966 80th percentileScored 2026-11-07
Fix Fixed Microsoft SharePoint Enterprise Server 2013 Service Pack 1 (Microsoft): 15.0.5363.1000Microsoft SharePoint Enterprise Server 2016 (Microsoft): 16.0.5188.1000+2 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 | Microsoft SharePoint Enterprise Server 2013 Service Pack 1 | 15.0.0 to before 15.0.5363.1000 | 15.0.5363.1000 | Patch available | CNA |
| Microsoft | Microsoft SharePoint Enterprise Server 2016 | 16.0.0 to before 16.0.5188.1000 | 16.0.5188.1000 | Patch available | CNA |
| Microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 | 15.0.0 to before 15.0.5363.1000 | 15.0.5363.1000 | Patch available | CNA |
| Microsoft | Microsoft SharePoint Server 2019 | 16.0.0 to before 16.0.10376.20001 | 16.0.10376.20001 | Patch available | CNA |
- Microsoft SharePoint Enterprise Server 2013 Service Pack 1 VendorMicrosoft Affected 15.0.0 to before 15.0.5363.1000 Fixed in 15.0.5363.1000 Patch available CNA
- Microsoft SharePoint Enterprise Server 2016 VendorMicrosoft Affected 16.0.0 to before 16.0.5188.1000 Fixed in 16.0.5188.1000 Patch available CNA
- Microsoft SharePoint Foundation 2013 Service Pack 1 VendorMicrosoft Affected 15.0.0 to before 15.0.5363.1000 Fixed in 15.0.5363.1000 Patch available CNA
- Microsoft SharePoint Server 2019 VendorMicrosoft Affected 16.0.0 to before 16.0.10376.20001 Fixed in 16.0.10376.20001 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:sharepoint_foundation:2013:sp1:*:*:*:*:*:* | 2013 sp1 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:sharepoint_server:2013:sp1:*:*:enterprise:*:*:* | 2013 sp1 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:* | 2016 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:* | 2019 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:sharepoint_foundation:2013:sp1:*:*:*:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:sharepoint_server:2013:sp1:*:*:enterprise:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:* Versions 2016 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:* Versions 2019 Vulnerable ·Microsoft
Remediation
- Fix · CNA Microsoft SharePoint Enterprise Server 2013 Service Pack 1 (Microsoft) Fixed in 15.0.5363.1000
- Fix · CNA Microsoft SharePoint Enterprise Server 2016 (Microsoft) Fixed in 16.0.5188.1000
- Fix · CNA Microsoft SharePoint Foundation 2013 Service Pack 1 (Microsoft) Fixed in 15.0.5363.1000
- Fix · CNA Microsoft SharePoint Server 2019 (Microsoft) Fixed in 16.0.10376.20001
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Spoofing
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Less Likely
| Product | Status | Plan or fix |
|---|---|---|
| Microsoft SharePoint Enterprise Server 2013 Service Pack 1 | Fixed | 15.0.5363.1000 · Security Update |
| Microsoft SharePoint Enterprise Server 2016 | Fixed | 16.0.5188.1000 · Security Update |
| Microsoft SharePoint Foundation 2013 Service Pack 1 | Fixed | 15.0.5363.1000 · Security Update |
| Microsoft SharePoint Server 2019 | Fixed | 16.0.10376.20001 · Security Update |
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34517
- 2026-10-03 Alias added: GHSA-cf5c-cp75-9wvg
References
More Microsoft Sharepoint Foundation vulnerabilities
- TI-2019-00394 Improper input validation in Microsoft SharePoint Server KEVCVSS 3.1CRITICAL 9.8
- TI-2023-08100 Microsoft Word Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-21993 Microsoft SharePoint Server Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
- TI-2022-17767 Microsoft SharePoint Server Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
- TI-2020-12940 Microsoft SharePoint Remote Code Execution Vulnerability CVSS 3.1HIGH 8.6
- TI-2020-01145 A remote code execution vulnerability exists in Microsoft SharePoint Server when it fails… CVSS 3.1HIGH 8.8
Sources
- CVE-2021-34517 · CVE Program
- CVE-2021-34517 · NVD
- FIRST EPSS
- GHSA-cf5c-cp75-9wvg · GitHub Advisory Database · CC BY 4.0
- CVE-2021-34517 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences