CVE-2023-1751: The listed versions of Nexx Smart Home devices use a WebSocket server that does not validate if the bearer tok

Q: How do I fix CVE-2023-1751?

nxal-100 firmware: upgrade to newer than nxal100v-p1-9-1; nxg-100b firmware: upgrade to newer than nxg100bv-p3-4-1; nxpg-100w firmware: upgrade to newer than nxpg100cv4-0-0. Exact commands for each OS are on this page.

Q: Is CVE-2023-1751 being exploited?

CVE-2023-1751 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-1751 affect?

CVE-2023-1751 affects nxal-100 firmware, nxg-100b firmware, nxpg-100w firmware. Severity is high (CVSS 7.5). The listed versions of Nexx Smart Home devices use a WebSocket server that does not validate if the bearer token in the Authorization header belongs to the device attempting to associate. This could allow any authorized user to receive alar

Q: How urgent is CVE-2023-1751?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE

CVE-2023-1751 is a high-severity flaw (CVSS 7.5) affecting nxal-100 firmware, nxg-100b firmware, nxpg-100w firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The listed versions of Nexx Smart Home devices use a WebSocket server that does not validate if the bearer token in the Authorization header belongs to the device attempting to associate. This could allow any authorized user to receive alarm information and signals meant for other devices which leak a deviceId.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Published	2023-04-04
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: getnexx

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

Am I affected?

Timeline

2023-04-04 17:15 UTCPublished CVE record published
2026-06-17 05:28 UTCUpdated Record last modified

getnexx nxal-100 firmware UPGRADE

Affected: <= nxal100v-p1-9-1

Fixed in: newer than nxal100v-p1-9-1

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.

getnexx nxg-100b firmware UPGRADE

Affected: <= nxg100bv-p3-4-1

Fixed in: newer than nxg100bv-p3-4-1

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.

getnexx nxpg-100w firmware UPGRADE

Affected: <= nxpg100cv4-0-0

Fixed in: newer than nxpg100cv4-0-0

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.

getnexx nxg-200 firmware UPGRADE

Affected: <= nxg200v-p3-4-1

Fixed in: newer than nxg200v-p3-4-1

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-2023-1751?

nxal-100 firmware: upgrade to newer than nxal100v-p1-9-1; nxg-100b firmware: upgrade to newer than nxg100bv-p3-4-1; nxpg-100w firmware: upgrade to newer than nxpg100cv4-0-0. Exact commands for each OS are on this page.

Is CVE-2023-1751 being exploited?

CVE-2023-1751 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-2023-1751 affect?

CVE-2023-1751 affects nxal-100 firmware, nxg-100b firmware, nxpg-100w firmware. Severity is high (CVSS 7.5). The listed versions of Nexx Smart Home devices use a WebSocket server that does not validate if the bearer token in the Authorization header belongs to the device attempting to associate. This could allow any authorized user to receive alar

How urgent is CVE-2023-1751?

Priority 43/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-1752 HIGH 8.1 UPGRADE UPGRADE The listed versions of Nexx Smart Home devices could allow any user to register an already registered alarm or
CVE-2023-1750 HIGH 7.1 UPGRADE UPGRADE The listed versions of Nexx Smart Home devices lack proper access control when executing actions
CVE-2023-1749 MEDIUM 6.5 UPGRADE UPGRADE The listed versions of Nexx Smart Home devices lack proper access control when executing actions
CVE-2023-1748 CRITICAL 9.3 UPGRADE UPGRADE The listed versions of Nexx Smart Home devices use hard-coded credentials

References

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