Read the docs
TI-2021-08487 Aliases CVE-2021-26878GHSA-3pr4-34cm-c5pq

Windows Print Spooler Elevation of Privilege Vulnerability

Priority LOW 36Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

Windows Print Spooler Elevation of Privilege Vulnerability

Why it matters now

EPSS 0.00853 58th percentileScored 2026-11-07
Fix Fixed Microsoft: 14 updates

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftWindows 10 Version 150710.0.10240.0 to before 10.0.10240.1887410.0.10240.18874Patch availableCNA
MicrosoftWindows 10 Version 160710.0.14393.0 to before 10.0.14393.428310.0.14393.4283Patch availableCNA
MicrosoftWindows 10 Version 180310.0.0 to before 10.0.17134.208710.0.17134.2087Patch availableCNA
MicrosoftWindows 10 Version 180910.0.17763.0 to before 10.0.17763.181710.0.17763.1817Patch availableCNA
MicrosoftWindows 10 Version 180910.0.0 to before 10.0.17763.181710.0.17763.1817Patch availableCNA
MicrosoftWindows 10 Version 190910.0.0 to before 10.0.18363.144010.0.18363.1440Patch availableCNA
MicrosoftWindows 10 Version 200410.0.0 to before 10.0.19043.86710.0.19043.867Patch availableCNA
MicrosoftWindows 10 Version 20H210.0.0 to before 10.0.19043.86710.0.19043.867Patch availableCNA
MicrosoftWindows 76.1.0 to before 6.1.7601.245666.1.7601.24566Patch availableCNA
MicrosoftWindows 7 Service Pack 16.1.0 to before 6.1.7601.245666.1.7601.24566Patch availableCNA
MicrosoftWindows 8.16.3.0 to before 6.3.9600.199686.3.9600.19968Patch availableCNA
MicrosoftWindows Server 2008 R2 Service Pack 16.1.7601.0 to before 6.1.7601.245666.1.7601.24566Patch availableCNA
MicrosoftWindows Server 2008 R2 Service Pack 1 (Server Core installation)6.1.7601.0 to before 6.1.7601.245666.1.7601.24566Patch availableCNA
MicrosoftWindows Server 2008 Service Pack 26.0.6003.0 to before 6.0.6003.210706.0.6003.21070Patch availableCNA
MicrosoftWindows Server 2008 Service Pack 2 (Server Core installation)6.0.6003.0 to before 6.0.6003.210706.0.6003.21070Patch availableCNA
MicrosoftWindows Server 20126.2.9200.0 to before 6.2.9200.232986.2.9200.23298Patch availableCNA
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0 to before 6.2.9200.232986.2.9200.23298Patch availableCNA
MicrosoftWindows Server 2012 R26.3.9600.0 to before 6.3.9600.199686.3.9600.19968Patch availableCNA
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 to before 6.3.9600.199686.3.9600.19968Patch availableCNA
MicrosoftWindows Server 201610.0.14393.0 to before 10.0.14393.428310.0.14393.4283Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 to before 10.0.14393.428310.0.14393.4283Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.181710.0.17763.1817Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.181710.0.17763.1817Patch availableCNA
MicrosoftWindows Server version 200410.0.0 to before 10.0.19043.86710.0.19043.867Patch availableCNA
MicrosoftWindows Server version 20H210.0.0 to before 10.0.19043.86710.0.19043.867Patch availableCNA
MicrosoftWindows Server, version 1909 (Server Core installation)10.0.0 to before 10.0.18363.144010.0.18363.1440Patch availableCNA
  • Windows 10 Version 1507 VendorMicrosoft Affected 10.0.10240.0 to before 10.0.10240.18874 Fixed in 10.0.10240.18874 Patch available CNA
  • Windows 10 Version 1607 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.4283 Fixed in 10.0.14393.4283 Patch available CNA
  • Windows 10 Version 1803 VendorMicrosoft Affected 10.0.0 to before 10.0.17134.2087 Fixed in 10.0.17134.2087 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.1817 Fixed in 10.0.17763.1817 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.1817 Fixed in 10.0.17763.1817 Patch available CNA
  • Windows 10 Version 1909 VendorMicrosoft Affected 10.0.0 to before 10.0.18363.1440 Fixed in 10.0.18363.1440 Patch available CNA
  • Windows 10 Version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.867 Fixed in 10.0.19043.867 Patch available CNA
  • Windows 10 Version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.867 Fixed in 10.0.19043.867 Patch available CNA
  • Windows 7 VendorMicrosoft Affected 6.1.0 to before 6.1.7601.24566 Fixed in 6.1.7601.24566 Patch available CNA
  • Windows 7 Service Pack 1 VendorMicrosoft Affected 6.1.0 to before 6.1.7601.24566 Fixed in 6.1.7601.24566 Patch available CNA
  • Windows 8.1 VendorMicrosoft Affected 6.3.0 to before 6.3.9600.19968 Fixed in 6.3.9600.19968 Patch available CNA
  • Windows Server 2008 R2 Service Pack 1 VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.24566 Fixed in 6.1.7601.24566 Patch available CNA
  • Windows Server 2008 R2 Service Pack 1 (Server Core installation) VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.24566 Fixed in 6.1.7601.24566 Patch available CNA
  • Windows Server 2008 Service Pack 2 VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.21070 Fixed in 6.0.6003.21070 Patch available CNA
  • Windows Server 2008 Service Pack 2 (Server Core installation) VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.21070 Fixed in 6.0.6003.21070 Patch available CNA
  • Windows Server 2012 VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.23298 Fixed in 6.2.9200.23298 Patch available CNA
  • Windows Server 2012 (Server Core installation) VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.23298 Fixed in 6.2.9200.23298 Patch available CNA
  • Windows Server 2012 R2 VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.19968 Fixed in 6.3.9600.19968 Patch available CNA
  • Windows Server 2012 R2 (Server Core installation) VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.19968 Fixed in 6.3.9600.19968 Patch available CNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.4283 Fixed in 10.0.14393.4283 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.4283 Fixed in 10.0.14393.4283 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.1817 Fixed in 10.0.17763.1817 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.1817 Fixed in 10.0.17763.1817 Patch available CNA
  • Windows Server version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.867 Fixed in 10.0.19043.867 Patch available CNA
  • Windows Server version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.867 Fixed in 10.0.19043.867 Patch available CNA
  • Windows Server, version 1909 (Server Core installation) VendorMicrosoft Affected 10.0.0 to before 10.0.18363.1440 Fixed in 10.0.18363.1440 Patch available CNA

CPE configurations NVD · 19

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:*20h2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*1607VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:*1803VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*1809VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:*1909VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:*2004VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:* Versions 20h2 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* Versions 1607 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:* Versions 1803 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* Versions 1809 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* Versions 1909 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* Versions 2004 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
Show 9 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*r2 sp1VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*r2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*20h2VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*1909VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*2004VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* Versions r2 sp1 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:* Versions 20h2 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:* Versions 1909 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* Versions 2004 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

Microsoft 14 updates

  • KB5000856
    https
    • Windows Server 2008 for 32-bit Systems Service Pack 2 Security Only
    • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) Security Only
    • Windows Server 2008 for x64-based Systems Service Pack 2 Security Only
    • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) Security Only
  • KB5000853
    https
    • Windows 8.1 for 32-bit systems Security Only
    • Windows 8.1 for x64-based systems Security Only
    • Windows Server 2012 R2 Security Only
    • Windows Server 2012 R2 (Server Core installation) Security Only
  • KB5000851
    https
    • Windows 7 for 32-bit Systems Service Pack 1 Security Only
    • Windows 7 for x64-based Systems Service Pack 1 Security Only
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 Security Only
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Security Only
Show 11 more Microsoft updates
  • KB5000848
    Monthly Rollup
    • Internet Explorer 11 6.3.9600.19968
    • Windows 8.1 for 32-bit systems 6.3.9600.19968
    • Windows 8.1 for x64-based systems 6.3.9600.19968
    • Windows RT 8.1 6.3.9600.19968
    • Windows Server 2012 R2 6.3.9600.19968
    • Windows Server 2012 R2 (Server Core installation) 6.3.9600.19968
  • KB5000847
    Monthly Rollup
    • Internet Explorer 11 6.2.9200.23298
    • Windows Server 2012 6.2.9200.23298
    • Windows Server 2012 (Server Core installation) 6.2.9200.23298
  • KB5000844
    Monthly Rollup
    • Internet Explorer 9 6.0.6003.21070
    • Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.21070
    • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.21070
    • Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.21070
    • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.21070
  • KB5000841
    Monthly Rollup
    • Internet Explorer 11 6.1.7601.24566
    • Windows 7 for 32-bit Systems Service Pack 1 6.1.7601.24566
    • Windows 7 for x64-based Systems Service Pack 1 6.1.7601.24566
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.24566
    • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.24566
  • KB5000840
    https
    • Windows Server 2012 Security Only
    • Windows Server 2012 (Server Core installation) Security Only
  • KB5000822
    Security Update
    • Internet Explorer 11 10.0.17763.1817
    • Microsoft Edge (EdgeHTML-based) 10.0.17763.1817
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.1817
    • Windows 10 Version 1809 for ARM64-based Systems 10.0.17763.1817
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.1817
    • Windows Server 2019 10.0.17763.1817
    • Windows Server 2019 (Server Core installation) 10.0.17763.1817
  • KB5000809
    Security Update
    • Internet Explorer 11 10.0.17134.2087
    • Microsoft Edge (EdgeHTML-based) 10.0.17134.2087
    • Windows 10 Version 1803 for 32-bit Systems 10.0.17134.2087
    • Windows 10 Version 1803 for ARM64-based Systems 10.0.17134.2087
    • Windows 10 Version 1803 for x64-based Systems 10.0.17134.2087
  • KB5000808
    Security Update
    • Internet Explorer 11 10.0.18363.1440
    • Microsoft Edge (EdgeHTML-based) 10.0.18363.1440
    • Windows 10 Version 1909 for 32-bit Systems 10.0.18363.1440
    • Windows 10 Version 1909 for ARM64-based Systems 10.0.18363.1440
    • Windows 10 Version 1909 for x64-based Systems 10.0.18363.1440
    • Windows Server, version 1909 (Server Core installation) 10.0.18363.1440
  • KB5000807
    Security Update
    • Internet Explorer 11 10.0.10240.18874
    • Microsoft Edge (EdgeHTML-based) 10.0.10240.18874
    • Windows 10 for 32-bit Systems 10.0.10240.18874
    • Windows 10 for x64-based Systems 10.0.10240.18874
  • KB5000803
    Security Update
    • Internet Explorer 11 10.0.14393.4283
    • Microsoft Edge (EdgeHTML-based) 10.0.14393.4283
    • Windows 10 Version 1607 for 32-bit Systems 10.0.14393.4283
    • Windows 10 Version 1607 for x64-based Systems 10.0.14393.4283
    • Windows Server 2016 10.0.14393.4283
    • Windows Server 2016 (Server Core installation) 10.0.14393.4283
  • KB5000802
    Security Update
    • Internet Explorer 11 10.0.19043.867
    • Microsoft Edge (EdgeHTML-based) 10.0.19043.867
    • Windows 10 Version 2004 for 32-bit Systems 10.0.19043.867
    • Windows 10 Version 2004 for ARM64-based Systems 10.0.19043.867
    • Windows 10 Version 2004 for x64-based Systems 10.0.19043.867
    • Windows 10 Version 20H2 for 32-bit Systems 10.0.19043.867
    • Windows 10 Version 20H2 for ARM64-based Systems 10.0.19043.867
    • Windows Server, version 2004 (Server Core installation) 10.0.19043.867
    • Windows Server, version 20H2 (Server Core Installation) 10.0.19043.867

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-26878
  2. 2026-10-03 Alias added: GHSA-3pr4-34cm-c5pq

References

Patch 2

  • TI-2015-02132 Buffer underflow in atmfd.dll in the Windows Adobe Type Manager Library in Microsoft… KEVCVSS 3.1HIGH 8.8
  • TI-2022-10056 Remote Procedure Call Runtime Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2022-06273 HTTP Protocol Stack Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2019-00906 Remote Desktop Services Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2022-15533 Windows Internet Key Exchange (IKE) Protocol Extensions Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2015-01587 Mount Manager in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows… KEVCVSS 3.1MEDIUM 6.6
See all 2973 →

Sources

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