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ExploitedIn CISA KEVFix available

CVE-2020-1350

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2020-07-14
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A remote code execution vulnerability exists in Windows Domain Name System servers when they fail to properly handle requests, aka 'Windows DNS Server Remote Code Execution Vulnerability'.

Timeline

dates in UTC
  1. 2020-07-1423:15CVE publishedNVD
  2. 2021-11-03Added to the CISA KEV catalogCISA KEV
  3. 2021-11-03Listed as exploited by GCVEGCVE
  4. 2021-11-03Exploitation first reportedCISA KEV
  5. 2025-02-0714:38SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-1350?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-1350?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Microsoft windows server 2008
BranchAffectedFixed in
—all versionsno fix published
—= r2no fix published
Microsoft windows server 2012
BranchAffectedFixed in
—all versionsno fix published
—= r2no fix published
Microsoft windows server 2016
BranchAffectedFixed in
—all versionsno fix published

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA4 products

As microsoft, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Microsoft Windows Server
    Affected
    • = 2019no fix stated
    • = 2019 (Core installation)no fix stated
    • = 2016no fix stated
    • = 2016 (Core installation)no fix stated
    • = 2008 for 32-bit Systems Service Pack 2no fix stated
    • = 2008 for 32-bit Systems Service Pack 2 (Core installation)no fix stated
    • = 2008 for x64-based Systems Service Pack 2no fix stated
    • = 2008 for x64-based Systems Service Pack 2 (Core installation)no fix stated

    6 more version lines in the CVE record.

  • Microsoft Windows Server, version 1909 (Server Core installation)
  • Microsoft Windows Server, version 1903 (Server Core installation)
  • Microsoft Windows Server, version 2004 (Server Core installation)

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2020-07-21

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2022-05-03

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
15 repositories, unverifiedpsc4re/NSE-scriptsZephrFish/CVE-2020-1350_HoneyPoCmr-r3b00t/CVE-2020-1350zoomerxsec/Fake_CVE-2020-1350T13nn3s/CVE-2020-1350
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2021-11-03
Patch Due Date
2022-05-03
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
2020-07-14
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-hcmx-443w-mr76

Frequently asked questions

What is CVE-2020-1350?

A remote code execution vulnerability exists in Windows Domain Name System servers when they fail to properly handle requests, aka 'Windows DNS Server Remote Code Execution Vulnerability'.

Is CVE-2020-1350 actively exploited?

Yes. CVE-2020-1350 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-03.

What is the CVSS score for CVE-2020-1350?

CVE-2020-1350 has a CVSS v3 base score of 10 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

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Sources for this record