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6.5
CVE-2026-87714: Windows Server 2012 and Windows 10 permit WebDAV security bypass
CVE-2026-87714 · published 22 days ago
Summary
Windows Server 2012 and several Windows 10 versions (1607, 1809, 21H2, 22H2) have a gap that can let a user who already has access skip a protection built into WebDAV, a file‑sharing feature. This could let the user read, change, or delete files they shouldn’t be able to. Install the latest Microsoft updates and, if you don’t need WebDAV, disable or block it on your network to reduce the risk.
What to do
- Update microsoft windows server 2012 to version 6.2.9200.26434 or later.
- 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 (server core installation) to version 6.2.9200.26434 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 server 2012 | < 6.2.9200.26434 |
| 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 (server core installation) | < 6.2.9200.26434 |
| 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:-:*:*:*:*:*:*:* |
| 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
WebDAV Security Feature Bypass Vulnerability
Missing authorization in WebDAV allows an authorized attacker to bypass a security feature over a network.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87714 vendor-advisory patch
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Type
CWE-862Missing Authorization
Timeline
Published13 Oct 2026
Updated4 Nov 2026
First seen13 Oct 2026
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