CVE-2022-40903: Aiphone GT-DMB-N 3-in-1 Video Entrance Station with NFC Reader 1.0.3 does not mitigate against repeated failed
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Routine
MEDIUM 6.5UPGRADEUPGRADEUPGRADE
CVE-2022-40903 is a medium-severity flaw (CVSS 6.5) affecting gt-dmb-n firmware, gt-dmb firmware, gt-dmb-lvn firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Aiphone GT-DMB-N 3-in-1 Video Entrance Station with NFC Reader 1.0.3 does not mitigate against repeated failed access attempts, which allows an attacker to gain administrative privileges.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
aiphone gt-dmb-n firmware UPGRADE
Affected: < 3.00
Fixed in: 3.00
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.
aiphone gt-dmb firmware UPGRADE
Affected: < 3.00
Fixed in: 3.00
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.
aiphone gt-dmb-lvn firmware UPGRADE
Affected: < 3.00
Fixed in: 3.00
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.
aiphone gt-db-vn firmware UPGRADE
Affected: < 2.00
Fixed in: 2.00
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 sourceNVD · 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-2022-40903?
gt-dmb-n firmware: upgrade to 3.00; gt-dmb firmware: upgrade to 3.00; gt-dmb-lvn firmware: upgrade to 3.00. Exact commands for each OS are on this page.
Is CVE-2022-40903 being exploited?
CVE-2022-40903 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-2022-40903 affect?
CVE-2022-40903 affects gt-dmb-n firmware, gt-dmb firmware, gt-dmb-lvn firmware. Severity is medium (CVSS 6.5). Aiphone GT-DMB-N 3-in-1 Video Entrance Station with NFC Reader 1.0.3 does not mitigate against repeated failed access attempts, which allows an attacker to gain administrative privileges.
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