# CVE-2019-0975: ADFS Security Feature Bypass Vulnerability

CVE-2019-0975 is fixed in 6 products on 1 platform, first by KB4507460, released July 9, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-0975
- Priority: Routine
- CVSS: 4.3 (Important)
- EPSS: 0.0182
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Jul 9, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0975

## Description

<p>A security feature bypass vulnerability exists when Active Directory Federation Services (ADFS) improperly updates its list of banned IP addresses.</p> <p>To exploit this vulnerability, an attacker would have to convince a victim ADFS administrator to update the list of banned IP addresses.</p> <p>This security update corrects how ADFS updates its list of banned IP addresses.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows Server 2016 | 14393.3085 | [KB4507460](https://patchblox.com/security/data/fix/microsoft/kb4507460.md) | Jul 9, 2019 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.3085 | [KB4507460](https://patchblox.com/security/data/fix/microsoft/kb4507460.md) | Jul 9, 2019 |
| Microsoft | Windows Server 2019 | 17763.615 | [KB4507469](https://patchblox.com/security/data/fix/microsoft/kb4507469.md) | Jul 9, 2019 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.615 | [KB4507469](https://patchblox.com/security/data/fix/microsoft/kb4507469.md) | Jul 9, 2019 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.885 | [KB4507435](https://patchblox.com/security/data/fix/microsoft/kb4507435.md) | Jul 9, 2019 |
| Microsoft | Windows Server, version 1903 (Server Core installation) | 18362.239 | [KB4507453](https://patchblox.com/security/data/fix/microsoft/kb4507453.md) | Jul 9, 2019 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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