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NVD / CVE Program· CNA microsoft

CVE-2020-1472: Netlogon Elevation of Privilege Vulnerability

Noroxi assessment

Priority: Now (action score 82/100)

  • CISA has confirmed exploitation in the wild (Nov 3, 2021); it is known to be used in ransomware campaigns. Remediation deadline for US federal agencies: May 3, 2022.
  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Probability of exploitation in the next 30 days: 99.3% (FIRST EPSS); higher than 99.9% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: libsmbclient-devel (AlmaLinux:8) 4.13.3-3.el8; libwbclient-devel (AlmaLinux:8) 4.13.3-3.el8; openchange (AlmaLinux:8) 2.3-27.el8.
  • Mentioned 6 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Patch today or shut off access. Upgrade to libsmbclient-devel (AlmaLinux:8) 4.13.3-3.el8; libwbclient-devel (AlmaLinux:8) 4.13.3-3.el8; openchange (AlmaLinux:8) 2.3-27.el8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network. To exploit the vulnerability, an unauthenticated attacker would be required to use MS-NRPC to connect to a domain controller to obtain domain administrator access. Microsoft is addressing the vulnerability in a phased two-part rollout. These updates address the vulnerability by modifying how Netlogon handles the usage of Netlogon secure channels. For guidelines on how to manage the changes required for this vulnerability and more information on the phased rollout, see How to manage the changes in Netlogon secure channel connections associated with CVE-2020-1472 (updated September 28, 2020). When the second phase of Windows updates become available in Q1 2021, customers will be notified via a revision to this security vulnerability. If you wish to be notified when these updates are released, we recommend that you register for the security notifications mailer to be alerted of content changes to this advisory. See Microsoft Technical Security Notifications.

MediumCVSS 5.5 · v3.1KEVWeaponized Fix available
Published
Aug 17, 2020
Updated
Jun 16, 2026
EPSS
99.3% · 99th percentile
CWE
—

Report tools

JSON

Action score

82

Now

Patch today or shut off access.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
30 / 30 · Listed
EPSS
30 / 30 · 99.3%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
5.5
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Nov 3, 2021. That signals real attacks, not theory.

Remediation deadline for US federal agencies: May 3, 2022.

Known to be used in ransomware campaigns.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoftwindows server 1903
microsoftwindows server 1909
microsoftwindows server 2004
microsoftwindows server 2008
microsoftwindows server 2012
microsoftwindows server 2016
microsoftwindows server 2019
microsoftwindows server 20h2
fedoraprojectfedora
opensuseleap
canonicalubuntu linux
synologydirectory server

and 3 more

Using windows server 1903? Add it to your stack and be the first to know about CVEs like this one. (Windows Server, Active Directory)

Watch new CVEs for windows server 1903

When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or gets exploit code

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

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Don't want an account? Get "Exploited this week" by email every Monday

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft windows server 1903all versions
  • microsoft windows server 1909all versions
  • microsoft windows server 2004all versions
  • microsoft windows server 2008r2
  • microsoft windows server 2012all versions
  • microsoft windows server 2012r2
  • microsoft windows server 2016all versions
  • microsoft windows server 2019all versions
  • microsoft windows server 20h2all versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft Windows Server 2008 R2 Service Pack 1

    • 6.1.0 and later · before publicationaffected

  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)

    • 6.0.0 and later · before publicationaffected

  • Microsoft Windows Server 2012

    • 6.2.0 and later · before publicationaffected

  • Microsoft Windows Server 2012 (Server Core installation)

    • 6.2.0 and later · before publicationaffected

  • Microsoft Windows Server 2012 R2

    • 6.3.0 and later · before publicationaffected

  • Microsoft Windows Server 2012 R2 (Server Core installation)

    • 6.3.0 and later · before publicationaffected

  • Microsoft Windows Server 2016

    • 10.0.0 and later · before publicationaffected

  • Microsoft Windows Server 2016 (Server Core installation)

    • 10.0.0 and later · before publicationaffected

  • Microsoft Windows Server 2019

    • 10.0.0 and later · before publicationaffected

  • Microsoft Windows Server 2019 (Server Core installation)

    • 10.0.0 and later · before publicationaffected

  • Microsoft Windows Server version 2004

    • 10.0.0 and later · before publicationaffected

  • Microsoft Windows Server version 20H2

    • 10.0.0 and later · before publicationaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8libsmbclient-develbefore 4.13.3-3.el84.13.3-3.el8
AlmaLinux:8libwbclient-develbefore 4.13.3-3.el84.13.3-3.el8
AlmaLinux:8openchangebefore 2.3-27.el82.3-27.el8
AlmaLinux:8samba-develbefore 4.13.3-3.el84.13.3-3.el8
Alpine:v3.10sambafrom 4.11.0 · before 4.10.18-r04.10.18-r0
Alpine:v3.11sambafrom 4.11.0 · before 4.11.14-r04.11.14-r0
Alpine:v3.12sambafrom 4.11.0 · before 4.12.7-r04.12.7-r0
Debian:12sambabefore 2:4.13.2+dfsg-22:4.13.2+dfsg-2
Debian:9sambabefore 2:4.5.16+dfsg-1+deb9u32:4.5.16+dfsg-1+deb9u3
openSUSE:Leap 15.1sambabefore 4.9.5+git.373.26895a83dbf-lp151.2.33.14.9.5+git.373.26895a83dbf-lp151.2.33.1
openSUSE:Leap 15.2sambabefore 4.11.13+git.189.e9bd318cd13-lp152.3.13.14.11.13+git.189.e9bd318cd13-lp152.3.13.1
openSUSE:Leap 15.3sca-patterns-basebefore 1.5.0-150300.10.3.11.5.0-150300.10.3.1
openSUSE:Leap 15.3sca-patterns-haebefore 1.5.1-150300.10.3.11.5.1-150300.10.3.1
openSUSE:Leap 15.3sca-patterns-sle11before 1.5.1-150300.18.3.11.5.1-150300.18.3.1
openSUSE:Leap 15.3sca-patterns-sle12before 1.5.1-150300.3.3.11.5.1-150300.3.3.1
openSUSE:Leap 15.3sca-patterns-sle15before 1.5.1-150300.14.3.11.5.1-150300.14.3.1
openSUSE:Leap 15.3sca-patterns-sumabefore 1.5.0-150300.9.3.11.5.0-150300.9.3.1
openSUSE:Leap 15.3sca-server-reportbefore 1.5.1-150300.11.3.11.5.1-150300.11.3.1
openSUSE:Tumbleweedsca-patterns-sle12before 1.0.8-2.21.0.8-2.2
openSUSE:Tumbleweedsca-patterns-sle15before 1.0.8-2.21.0.8-2.2
Red Hat:enterprise_linux:7::clientlibsmbclientbefore 0:4.10.16-9.el7_90:4.10.16-9.el7_9
Red Hat:enterprise_linux:7::clientlibsmbclient-develbefore 0:4.10.16-9.el7_90:4.10.16-9.el7_9
Red Hat:enterprise_linux:7::clientlibwbclientbefore 0:4.10.16-9.el7_90:4.10.16-9.el7_9
Red Hat:enterprise_linux:7::clientlibwbclient-develbefore 0:4.10.16-9.el7_90:4.10.16-9.el7_9

+96

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:libsmbclient-devel4.13.3-3.el8 · AlmaLinux:8Package registry (OSV)
almalinux:libwbclient-devel4.13.3-3.el8 · AlmaLinux:8Package registry (OSV)
almalinux:openchange2.3-27.el8 · AlmaLinux:8Package registry (OSV)
almalinux:samba-devel4.13.3-3.el8 · AlmaLinux:8Package registry (OSV)
alpine:samba4.10.18-r0 · Alpine:v3.10Package registry (OSV)
debian:samba2:4.13.2+dfsg-2 · Debian:12Package registry (OSV)
opensuse:samba4.9.5+git.373.26895a83dbf-lp151.2.33.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:sca-patterns-base1.5.0-150300.10.3.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:sca-patterns-hae1.5.1-150300.10.3.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:sca-patterns-sle111.5.1-150300.18.3.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:sca-patterns-sle121.5.1-150300.3.3.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:sca-patterns-sle151.5.1-150300.14.3.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:sca-patterns-suma1.5.0-150300.9.3.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:sca-server-report1.5.1-150300.11.3.1 · openSUSE:Leap 15.3Package registry (OSV)
red hat:ctdb0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:ctdb-debuginfo0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:ctdb-tests-debuginfo0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:libsmbclient0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:libsmbclient-debuginfo0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:libsmbclient-devel0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:libwbclient0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:libwbclient-debuginfo0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:libwbclient-devel0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:python3-samba0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:python3-samba-debuginfo0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
red hat:samba0:4.13.7-101.el8rhgs · Red Hat:storage:3.5:samba:el8Package registry (OSV)
rocky linux:openchange0:2.3-27.el8 · Rocky Linux:8Package registry (OSV)
rocky linux:samba0:4.13.3-3.el8 · Rocky Linux:8Package registry (OSV)
suse:samba4.7.11+git.270.63e2076625b-4.48.1 · SUSE:Linux Enterprise High Availability Extension 15Package registry (OSV)
suse:sca-patterns-base1.5.0-150300.10.3.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP3Package registry (OSV)

+6

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×1
  • Proof-of-concept repository on GitHub ×50

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2020-11-18
Metasploit moduleauxiliary/admin/dcerpc/cve_2020_1472_zerologonNetlogon Weak Cryptographic Authenticationauxiliary—
Proof-of-concept repository on GitHubstars:02020-08-12
Proof-of-concept repository on GitHubstars:18402020-09-08
Proof-of-concept repository on GitHubstars:382020-09-14
Proof-of-concept repository on GitHubstars:13332020-09-14
Proof-of-concept repository on GitHubstars:3992020-09-14
Proof-of-concept repository on GitHubstars:7092020-09-14
Proof-of-concept repository on GitHubstars:1792020-09-14
Proof-of-concept repository on GitHubstars:22020-09-15
Proof-of-concept repository on GitHubstars:42020-09-15
Proof-of-concept repository on GitHubstars:72020-09-15

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-6 d
  2. Published
  3. CISA KEV+442 d
  4. TodayOct 31, 2026+2266 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (16 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records