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CVE-2023-6942: Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation EZSocket version

47
This month
HIGH 7.5REMOTEDOWNGRADEMITIGATEMITIGATE

CVE-2023-6942 is a high-severity flaw (CVSS 7.5) affecting ezsocket, fr configurator2, got1000. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation EZSocket versions 3.0 to 5.92, GT Designer3 Version1(GOT1000) versions 1.325P and prior, GT Designer3 Version1(GOT2000) versions 1.320J and prior, GX Works2 versions 1.11M to 1.626C, GX Works3 versions 1.106L and prior, MELSOFT Navigator versions 1.04E to 2.102G, MT Works2 versions 1.190Y and prior, MX Component versions 4.00A to 5.007H and MX OPC Server

Why this priority

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

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.9% (top 39%)
CISA exploited listNo
WeaknessCWE-306
Published2024-01-30
Last modified2026-06-17
Publisher (CNA): Mitsubishi Electric Corporation · Vendor: mitsubishielectric

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

Am I affected?

Timeline

mitsubishielectric ezsocket DOWNGRADE
Affected: >= 3.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 3.0
1. Check installed version
apt-cache policy ezsocket || rpm -q ezsocket || ezsocket --version
2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)
apt-cache madison ezsocket sudo apt install ezsocket=<VERSION_BEFORE_3.0> sudo apt-mark hold ezsocket
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list ezsocket sudo dnf downgrade ezsocket-<VERSION_BEFORE_3.0> sudo dnf versionlock add ezsocket
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
mitsubishielectric fr configurator2 MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy fr-configurator2 || rpm -q fr-configurator2 || fr-configurator2 --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
mitsubishielectric got1000 MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy got1000 || rpm -q got1000 || got1000 --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
mitsubishielectric got2000 MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy got2000 || rpm -q got2000 || got2000 --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
mitsubishielectric gx works2 DOWNGRADE
Affected: >= 1.11m
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.11m
1. Check installed version
apt-cache policy gx-works2 || rpm -q gx-works2 || gx-works2 --version
2. No fixed release: DOWNGRADE to a release before 1.11m (Debian / Ubuntu)
apt-cache madison gx-works2 sudo apt install gx-works2=<VERSION_BEFORE_1.11m> sudo apt-mark hold gx-works2
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list gx-works2 sudo dnf downgrade gx-works2-<VERSION_BEFORE_1.11m> sudo dnf versionlock add gx-works2
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
mitsubishielectric gx works3 MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy gx-works3 || rpm -q gx-works3 || gx-works3 --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
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-2023-6942?

ezsocket: downgrade or apply the listed mitigation; fr configurator2: mitigate or apply the listed mitigation; got1000: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-6942 being exploited?

CVE-2023-6942 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-2023-6942 affect?

CVE-2023-6942 affects ezsocket, fr configurator2, got1000. Severity is high (CVSS 7.5). Missing Authentication for Critical Function vulnerability in Mitsubishi Electric Corporation EZSocket versions 3.0 to 5.92, GT Designer3 Version1(GOT1000) versions 1.325P and prior, GT Designer3 Version1(GOT2000) versions 1.320J and prior,

How urgent is CVE-2023-6942?

Priority 47/100. High severity; Remotely exploitable, no login, no user action

Software pages

Mitsubishi Electric vulnerabilities

Related CVEs

References

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