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CVE-2023-38405: On Crestron 3-Series Control Systems before 1.8001.0187, crafting and sending a specific BACnet packet can cau

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HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE

CVE-2023-38405 is a high-severity flaw (CVSS 7.5) affecting cp3n 6505417 firmware, cp3 6504877 firmware, cp3-gv 6506034 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

On Crestron 3-Series Control Systems before 1.8001.0187, crafting and sending a specific BACnet packet can cause a crash.

Why this priority

  • High severity
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.6% (top 51%)
CISA exploited listNo
WeaknessCWE-770
Published2023-07-17
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: crestron

Share: LinkedIn · X · Reddit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

crestron cp3n 6505417 firmware UPGRADE
Affected: < 1.8001.0187
Fixed in: 1.8001.0187
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
crestron cp3 6504877 firmware UPGRADE
Affected: < 1.8001.0187
Fixed in: 1.8001.0187
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
crestron cp3-gv 6506034 firmware UPGRADE
Affected: < 1.8001.0187
Fixed in: 1.8001.0187
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-38405?

cp3n 6505417 firmware: upgrade to 1.8001.0187; cp3 6504877 firmware: upgrade to 1.8001.0187; cp3-gv 6506034 firmware: upgrade to 1.8001.0187. Exact commands for each OS are on this page.

Is CVE-2023-38405 being exploited?

CVE-2023-38405 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-38405 affect?

CVE-2023-38405 affects cp3n 6505417 firmware, cp3 6504877 firmware, cp3-gv 6506034 firmware. Severity is high (CVSS 7.5). On Crestron 3-Series Control Systems before 1.8001.0187, crafting and sending a specific BACnet packet can cause a crash.

How urgent is CVE-2023-38405?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

References

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