Track vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
7.8
CVE-2026-88147: Windows 10/11 SSTP may let attacker gain admin rights
CVE-2026-88147 · published 22 days ago
Summary
The Secure Socket Tunneling Protocol component in Windows 10 (versions 1607, 1809, 21H2, 22H2) and Windows 11 (23H2) has a coding error that can be triggered by someone with local access, allowing them to increase their privileges to an administrator level. This could let a malicious insider or a compromised account take control of the system. Install the latest Windows updates from Microsoft as soon as they are available to fix the problem.
What to do
- Update microsoft windows 10 version 1607 to version 10.0.14393.9612 or later.
- Update microsoft windows 10 version 1809 to version 10.0.17763.9376 or later.
- Update microsoft windows 10 version 21h2 to version 10.0.19044.7807 or later.
- Update microsoft windows 11 version 23h2 to version 10.0.22631.7652 or later.
- Update microsoft windows 11 version 24h2 to version 10.0.26100.9711 or later.
- Update microsoft windows 11 version 25h2 to version 10.0.26200.9711 or later.
- Update microsoft windows 11 version 26h1 to version 10.0.28000.3231 or later.
- Update microsoft windows 11 version 26h2 to version 10.0.26300.9711 or later.
- Update microsoft windows server 2012 r2 to version 6.3.9600.23470 or later.
- Update microsoft windows server 2012 r2 (server core installation) to version 6.3.9600.23470 or later.
- Update microsoft windows server 2016 to version 10.0.14393.9612 or later.
- Update microsoft windows server 2016 (server core installation) to version 10.0.14393.9612 or later.
- Update microsoft windows server 2019 to version 10.0.17763.9376 or later.
- Update microsoft windows server 2019 (server core installation) to version 10.0.17763.9376 or later.
- Update microsoft windows server 2022 to version 10.0.20348.5761 or later.
- Update microsoft windows server 2025 to version 10.0.26100.33650 or later.
- Update microsoft windows server 2025 (server core installation) to version 10.0.26100.33650 or later.
- Update microsoft windows_10_1607 to version 10.0.14393.9612 or later.
- Update microsoft windows_10_1809 to version 10.0.17763.9376 or later.
- Update microsoft windows_10_21h2 to version 10.0.19044.7807 or later.
- Update microsoft windows_10_22h2 to version 10.0.19045.7807 or later.
- Update microsoft windows_11_23h2 to version 10.0.22631.7652 or later.
- Update microsoft windows_11_24h2 to version 10.0.26100.9711 or later.
- Update microsoft windows_11_25h2 to version 10.0.26200.9711 or later.
- Update microsoft windows_11_26h1 to version 10.0.28000.3231 or later.
- Update microsoft windows_11_26h2 to version 10.0.26300.9711 or later.
- Update microsoft windows_server_2016 to version 10.0.14393.9612 or later.
- Update microsoft windows_server_2019 to version 10.0.17763.9376 or later.
- Update microsoft windows_server_2022 to version 10.0.20348.5761 or later.
- Update microsoft windows_server_2025 to version 10.0.26100.33650 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| microsoft | windows 10 version 1607 | < 10.0.14393.9612 |
| microsoft | windows 10 version 1809 | < 10.0.17763.9376 |
| microsoft | windows 10 version 21h2 | < 10.0.19044.7807 |
| microsoft | windows 10 version 22h2 |
< 10.0.19044.7807 < 10.0.19045.7807 |
| microsoft | windows 11 version 23h2 | < 10.0.22631.7652 |
| microsoft | windows 11 version 24h2 | < 10.0.26100.9711 |
| microsoft | windows 11 version 25h2 | < 10.0.26200.9711 |
| microsoft | windows 11 version 26h1 | < 10.0.28000.3231 |
| microsoft | windows 11 version 26h2 | < 10.0.26300.9711 |
| microsoft | windows server 2012 r2 | < 6.3.9600.23470 |
| microsoft | windows server 2012 r2 (server core installation) | < 6.3.9600.23470 |
| microsoft | windows server 2016 | < 10.0.14393.9612 |
| microsoft | windows server 2016 (server core installation) | < 10.0.14393.9612 |
| microsoft | windows server 2019 | < 10.0.17763.9376 |
| microsoft | windows server 2019 (server core installation) | < 10.0.17763.9376 |
| microsoft | windows server 2022 | < 10.0.20348.5761 |
| microsoft | windows server 2025 | < 10.0.26100.33650 |
| microsoft | windows server 2025 (server core installation) | < 10.0.26100.33650 |
| microsoft | windows_10_1607 |
< 10.0.14393.9612 cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_1809 |
< 10.0.17763.9376 cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_21h2 |
< 10.0.19044.7807 cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_10_22h2 |
< 10.0.19045.7807 cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_23h2 |
< 10.0.22631.7652 cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_24h2 |
< 10.0.26100.9711 cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_25h2 |
< 10.0.26200.9711 cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_26h1 |
< 10.0.28000.3231 cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* |
| microsoft | windows_11_26h2 |
< 10.0.26300.9711 cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:* |
| microsoft | windows_server_2012 |
r2 cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 |
< 10.0.14393.9612 cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:x64:* |
| microsoft | windows_server_2019 |
< 10.0.17763.9376 cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:x64:* |
| microsoft | windows_server_2022 |
< 10.0.20348.5761 cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:* |
| microsoft | windows_server_2025 |
< 10.0.26100.33650 cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* |
Original advisory text
Windows Secure Socket Tunneling Protocol (SSTP) Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Secure Socket Tunneling Protocol (SSTP) allows an authorized attacker to elevate privileges locally.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88147 vendor-advisory patch
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker full control
Type
CWE-122Heap-based Buffer Overflow
Timeline
Published13 Oct 2026
Updated4 Nov 2026
First seen13 Oct 2026
Track software like this
Free during beta