# CVE-2026-69982: Active Directory Federation Services (AD FS) Security Feature Bypass Vulnerability

CVE-2026-69982 is fixed in 14 products on 1 platform, first by KB5126868, released October 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-69982
- Priority: Routine
- CVSS: 5.9 (Important)
- EPSS: 0.0065
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Oct 13, 2026
- Weakness: Weak Authentication
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69982

## Description

<p>Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to bypass a security feature over a network.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.9612 | [KB5126868](https://patchblox.com/security/data/fix/microsoft/kb5126868.md) | Oct 13, 2026 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.9612 | [KB5126868](https://patchblox.com/security/data/fix/microsoft/kb5126868.md) | Oct 13, 2026 |
| Microsoft | Windows 10 Version 1809 for 32-bit Systems | 17763.9376 | [KB5126651](https://patchblox.com/security/data/fix/microsoft/kb5126651.md) | Oct 13, 2026 |
| Microsoft | Windows 10 Version 1809 for x64-based Systems | 17763.9376 | [KB5126651](https://patchblox.com/security/data/fix/microsoft/kb5126651.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2012 R2 |  | [KB5126836](https://patchblox.com/security/data/fix/microsoft/kb5126836.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB5126836](https://patchblox.com/security/data/fix/microsoft/kb5126836.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2016 | 14393.9612 | [KB5126868](https://patchblox.com/security/data/fix/microsoft/kb5126868.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.9612 | [KB5126868](https://patchblox.com/security/data/fix/microsoft/kb5126868.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2019 | 17763.9376 | [KB5126651](https://patchblox.com/security/data/fix/microsoft/kb5126651.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.9376 | [KB5126651](https://patchblox.com/security/data/fix/microsoft/kb5126651.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2022 | 20348.5761 | [KB5126655](https://patchblox.com/security/data/fix/microsoft/kb5126655.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2022 (Server Core installation) | 20348.5761 | [KB5126655](https://patchblox.com/security/data/fix/microsoft/kb5126655.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2025 | 26100.33650 | [KB5126646](https://patchblox.com/security/data/fix/microsoft/kb5126646.md) | Oct 13, 2026 |
| Microsoft | Windows Server 2025 (Server Core installation) | 26100.33650 | [KB5126646](https://patchblox.com/security/data/fix/microsoft/kb5126646.md) | Oct 13, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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