# CVE-2020-16980: Windows iSCSI Target Service Elevation of Privilege Vulnerability

CVE-2020-16980 is fixed in 11 products on 1 platform, first by KB4580346, released October 13, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-16980
- Priority: High
- CVSS: 7.8 (Important)
- EPSS: 0.0090
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Oct 13, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-16980

## Description

<p>An elevation of privilege vulnerability exists when the Windows iSCSI Target Service improperly handles file operations. An attacker who successfully exploited this vulnerability could gain elevated privileges.</p> <p>To exploit the vulnerability, an attacker would first need code execution on a victim system. An attacker could then run a specially crafted application.</p> <p>The security update addresses the vulnerability by ensuring the Windows iSCSI Target Service properly handles file operations.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows Server 2012 |  | [KB4580382](https://patchblox.com/security/data/fix/microsoft/kb4580382.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 |  | [KB4580353](https://patchblox.com/security/data/fix/microsoft/kb4580353.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4580382](https://patchblox.com/security/data/fix/microsoft/kb4580382.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4580353](https://patchblox.com/security/data/fix/microsoft/kb4580353.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 R2 |  | [KB4580358](https://patchblox.com/security/data/fix/microsoft/kb4580358.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 R2 |  | [KB4580347](https://patchblox.com/security/data/fix/microsoft/kb4580347.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4580358](https://patchblox.com/security/data/fix/microsoft/kb4580358.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4580347](https://patchblox.com/security/data/fix/microsoft/kb4580347.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2016 | 14393.3986 | [KB4580346](https://patchblox.com/security/data/fix/microsoft/kb4580346.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.3986 | [KB4580346](https://patchblox.com/security/data/fix/microsoft/kb4580346.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2019 | 17763.1518 | [KB4577668](https://patchblox.com/security/data/fix/microsoft/kb4577668.md) | Oct 13, 2020 |
| Microsoft | Windows Server 2019 (Server Core installation) | 17763.1518 | [KB4577668](https://patchblox.com/security/data/fix/microsoft/kb4577668.md) | Oct 13, 2020 |
| Microsoft | Windows Server, version 1903 (Server Core installation) |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows Server, version 1909 (Server Core installation) |  | [KB4577671](https://patchblox.com/security/data/fix/microsoft/kb4577671.md) | Oct 13, 2020 |
| Microsoft | Windows Server, version 2004 (Server Core installation) | 19041.572 | [KB4579311](https://patchblox.com/security/data/fix/microsoft/kb4579311.md) | Oct 13, 2020 |

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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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