CVE-2023-1618: Active Debug Code vulnerability in Mitsubishi Electric Corporation MELSEC WS Series WS0-GETH00200 Serial numbe

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HIGH 7.5REMOTEMITIGATE

CVE-2023-1618 is a high-severity flaw (CVSS 7.5) affecting melsec ws0-geth00200 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Active Debug Code vulnerability in Mitsubishi Electric Corporation MELSEC WS Series WS0-GETH00200 Serial number 2310 **** and prior allows a remote unauthenticated attacker to bypass authentication and illegally log into the affected module by connecting to it via telnet which is hidden function and is enabled by default when shipped from the factory. As a result, a remote attacker with unauthorized login can reset the module, and if certain cond

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 score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-489, CWE-1188
Published	2023-05-19
Last modified	2026-06-17

Publisher (CNA): Mitsubishi Electric Corporation · Vendor: mitsubishielectric

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

Am I affected?

Timeline

2023-05-19 05:15 UTCPublished CVE record published
2026-06-17 05:28 UTCUpdated Record last modified

mitsubishielectric melsec ws0-geth00200 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

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-2023-1618?

melsec ws0-geth00200 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-1618 being exploited?

CVE-2023-1618 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-2023-1618 affect?

CVE-2023-1618 affects melsec ws0-geth00200 firmware. Severity is high (CVSS 7.5). Active Debug Code vulnerability in Mitsubishi Electric Corporation MELSEC WS Series WS0-GETH00200 Serial number 2310 **** and prior allows a remote unauthenticated attacker to bypass authentication and illegally log into the affected module

How urgent is CVE-2023-1618?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

Software pages

Mitsubishi Electric vulnerabilities

Related CVEs

CVE-2023-6374 MEDIUM 5.9 MITIGATE Authentication Bypass by Capture-replay vulnerability in Mitsubishi Electric Corporation MELSEC WS Series WS0-

References

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