# Netlogon Elevation of Privilege Vulnerability

CVE record · `CVE-2020-1472`

- **Identifiers:** `CVE-2020-1472`
- **State:** Confirmed
- **Severity:** CVSS 5.5 Medium
- **Critical:** Yes: KEV
- **CNA:** microsoft
- **Technologies:** [Microsoft Windows Server version 2004](https://agentprime.io/advisories/technology/microsoft-windows-server-version-2004.md) · [Microsoft Windows Server 2019](https://agentprime.io/advisories/technology/microsoft-windows-server-2019.md) · [Microsoft Windows Server 2019 (Server Core installation)](https://agentprime.io/advisories/technology/microsoft-windows-server-2019-server-core-installation.md) · [Microsoft Windows Server, version 1909 (Server Core installation)](https://agentprime.io/advisories/technology/microsoft-windows-server-version-1909-server-core-installation.md) · [Microsoft Windows Server, version 1903 (Server Core installation)](https://agentprime.io/advisories/technology/microsoft-windows-server-version-1903-server-core-installation.md) · [Microsoft Windows Server 2016](https://agentprime.io/advisories/technology/microsoft-windows-server-2016.md) · [Microsoft Windows Server 2016 (Server Core installation)](https://agentprime.io/advisories/technology/microsoft-windows-server-2016-server-core-installation.md) · [Microsoft Windows Server 2008 R2 Service Pack 1](https://agentprime.io/advisories/technology/microsoft-windows-server-2008-r2-service-pack-1.md) · [Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)](https://agentprime.io/advisories/technology/microsoft-windows-server-2008-r2-service-pack-1-server-core-installation.md) · [Microsoft Windows Server 2012](https://agentprime.io/advisories/technology/microsoft-windows-server-2012.md) · [Microsoft Windows Server 2012 (Server Core installation)](https://agentprime.io/advisories/technology/microsoft-windows-server-2012-server-core-installation.md) · [Microsoft Windows Server 2012 R2](https://agentprime.io/advisories/technology/microsoft-windows-server-2012-r2.md) · [Microsoft Windows Server 2012 R2 (Server Core installation)](https://agentprime.io/advisories/technology/microsoft-windows-server-2012-r2-server-core-installation.md) · [Microsoft Windows Server version 20H2](https://agentprime.io/advisories/technology/microsoft-windows-server-version-20h2.md)
- **Published:** 17 Aug 2020
- **Updated:** 21 Oct 2025
- **Reviewed by a person:** No

Published by the CVE Program (CNA: microsoft) at 17 Aug 2020, 19:13 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- In CISA’s KEV catalogue since 3 Nov 2021: it is known to be exploited.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Microsoft. Product: Windows Server version 2004.
  - affected: `10.0.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2019.
  - affected: `10.0.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2019 (Server Core installation).
  - affected: `10.0.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server, version 1909 (Server Core installation).
  - affected: `10.0.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server, version 1903 (Server Core installation).
  - affected: `10.0.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2016.
  - affected: `10.0.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2016 (Server Core installation).
  - affected: `10.0.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2008 R2 Service Pack 1.
  - affected: `6.1.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2008 R2 Service Pack 1 (Server Core installation).
  - affected: `6.0.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2012.
  - affected: `6.2.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2012 (Server Core installation).
  - affected: `6.2.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2012 R2.
  - affected: `6.3.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server 2012 R2 (Server Core installation).
  - affected: `6.3.0 to before publication` (custom)
- Vendor: Microsoft. Product: Windows Server version 20H2.
  - affected: `10.0.0 to before publication` (custom)

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 5.5 Medium, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C`, from CNA (microsoft)

- **CISA KEV:** Listed since 3 Nov 2021: known to be exploited. CISA reports use in ransomware campaigns.
- **EPSS:** 0.99, the 99th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 17 Aug 2020. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2020-1472](https://www.cve.org/CVERecord?id=CVE-2020-1472)
- [NVD: CVE-2020-1472](https://nvd.nist.gov/vuln/detail/CVE-2020-1472)

### References from the CNA

- <https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1472>
- <https://www.kb.cert.org/vuls/id/490028> (third-party-advisory, cert-vn)
- <http://www.openwall.com/lists/oss-security/2020/09/17/2> (mailing-list, mlist)
- <https://usn.ubuntu.com/4510-1/> (vendor-advisory, ubuntu)
- <https://usn.ubuntu.com/4510-2/> (vendor-advisory, ubuntu)
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H4OTFBL6YDVFH2TBJFJIE4FMHPJEEJK3/> (vendor-advisory, fedora)
- <http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00080.html> (vendor-advisory, suse)
- <http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00086.html> (vendor-advisory, suse)
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TAPQQZZAT4TG3XVRTAFV2Y3S7OAHFBUP/> (vendor-advisory, fedora)
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ST6X3A2XXYMGD4INR26DQ4FP4QSM753B/> (vendor-advisory, fedora)
- <https://usn.ubuntu.com/4559-1/> (vendor-advisory, ubuntu)
- <https://lists.debian.org/debian-lts-announce/2020/11/msg00041.html> (mailing-list, mlist)
- <https://security.gentoo.org/glsa/202012-24> (vendor-advisory, gentoo)
- <https://www.oracle.com/security-alerts/cpuApr2021.html>
- <http://packetstormsecurity.com/files/159190/Zerologon-Proof-Of-Concept.html>
- <https://www.synology.com/security/advisory/Synology_SA_20_21> (confirm)
- <http://packetstormsecurity.com/files/160127/Zerologon-Netlogon-Privilege-Escalation.html>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2020-1472>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2020-1472/>. Everything for agents: <https://agentprime.io/llms.txt>.