HOMEVULNERABILITIESCVE-2020-16839
HIGH

CVE-2020-16839

CWE-287Published: July 30, 2021· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

On Crestron DM-NVX-DIR, DM-NVX-DIR80, and DM-NVX-ENT devices before the DM-XIO/1-0-3-802 patch, the password can be changed by sending an unauthenticated WebSocket request.

NVD Source

Technical Analysis

CVE-2020-16839 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

crestron6 product(s)
dm-nvx-dir-80 firmwaredm-nvx-dir-80dm-nvx-dir-160 firmwaredm-nvx-dir-160dm-nvx-dir-ent firmwaredm-nvx-dir-ent
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://support.crestron.com
ADVISORYhttps://www.crestron.com/Security/Security-at-Crestron
ADVISORYhttps://support.crestron.com

All References (7)

→
https://support.crestron.comVendor Advisory
→
https://www.crestron.com/Software-Firmware/Firmware/DigitalMedia/DM-XIO/1-0-3-802Permissions Required
→
https://www.security.crestron.comBroken Link
→
https://www.crestron.com/Security/Security-at-CrestronVendor Advisory
→
https://support.crestron.comVendor Advisory
→
https://www.crestron.com/Software-Firmware/Firmware/DigitalMedia/DM-XIO/1-0-3-802Permissions Required
→
https://www.security.crestron.comBroken Link

Quick Facts

CVE IDCVE-2020-16839
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-287
CISA KEVNo
Affected1 vendor(s)
PublishedJul 30, 2021

Related CVEs (CWE-287)

CVE-2018-6667
10.0
CVE-2025-63216
10.0
CVE-2017-13995
10.0
CVE-2025-63224
10.0
CVE-2017-3791
10.0
CVE-2018-18505
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-16839 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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