CVE-2022-33323Network attack vector

Unauthorized controller access via active Telnet debug code

Published Feb 2, 2023 · Updated Mar 26, 2025

Authentication bypass in MELFA SD/SQ and F-Series robot controllers with S7x or R7x firmware allows remote attackers unauthorized access. Active debug code leaves a Telnet login path enabled and accepts an unauthorized session without normal authentication. Network reachability to the controller is sufficient; successful access permits unauthorized controller changes, while confidentiality and availability impacts are not reported.

CVSS severity7.5
High
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in MELFA SD/SQ and F-Series robot controllers with S7x or R7x firmware allows remote attackers unauthorized access. Active debug code leaves a Telnet login path enabled and accepts an unauthorized session without normal authentication. Network reachability to the controller is sufficient; successful access permits unauthorized controller changes, while confidentiality and availability impacts are not reported.

The record

CVE
CVE-2022-33323
Published
Feb 2, 2023
Updated
Mar 26, 2025
Vendor
Mitsubishi Electric Corporation
Product
MELFA SD/SQ Series Robot Controller
Classifications
CWE-489, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=R7x and prior
  2. Affected versionversion=S7x and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mitsubishi Electric Corporation · MELFA SD/SQ Series Robot Controllerversion=R7x and prior; version=S7x and prior
Mitsubishi Electric Corporation · MELFA SD Series Controller CR2DA-781version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VLD-0version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VLQ-0 of RV-7FLL-1Q-SH02version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20HD-1 of RV-20FM-Dversion=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VD-1 of RV-13F-D-SH03version=S7x and prior
Mitsubishi Electric Corporation · MELFA SD/SQ Series Controller CR1DA-721version=S7x and prior
Mitsubishi Electric Corporation · MELFA SD/SQ Series Controllerversion=R7x and prior; version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20HD-1 of RV-20F-D-SH03version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VLQ-0 of RV-7FLL-1Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20VQ-1 of RV-20F-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VQ-1 of RV-13FM-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20VQ-1 of RV-20FC-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7F-1Q-SH04version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VD-1 of RV-13FL-D-SH01version=S7x and prior
Mitsubishi Electric Corporation · MELFA SD/SQ Series Controller CR2DA-751version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VLQ-0 of RV-7FLLC-1Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR760-35VQ-1version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-02VD-0 of RV-2F-1Dversion=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20HD-1 of RV-20F-D-SH01version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VD-1 of RV-13F-D-SH01version=S7x and prior
Mitsubishi Electric Corporation · MELFA SD/SQ Series Controller CR2QAversion=R7x and prior
Mitsubishi Electric Corporation · MELFA CR750-04VD-1 Controllerversion=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20VQ-1 of RV-20F-Q-SH02version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VD-1 of RV-13F-Dversion=S7x and prior
Mitsubishi Electric Corporation · MELFA SD/SQ Series Controller CR1DA-731version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7F-1Q-SH01version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VLQ-0 of RV-7FLL-1Q-SH04version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20VQ-1 of RV-20F-Q-SH05version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20VQ-1 of RV-20F-Q-SH04version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FL-Q-SH05version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7F-Q-SH05version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VQ-1 of RV-13FLM-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7F-1Q-SH03version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7F-1Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VD-1 of RV-13F-D-SH04version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751version=R7x and prior; version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FL-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VQ-1 of RV-13FLC-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FL-Q-SH02version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20HD-1 of RV-20F-D-SH04version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FL-Q-SH03version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-13VD-0version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7FC-1Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7F-1Q-SH05version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-20VQ-0version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VLQ-0 of RV-7FLL-1Q-SH01version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7FL-1Q-SH01version=R7x and prior
Mitsubishi Electric Corporation · MELFA SQ Series Controller CR2QA-741version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-13VQ-0version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750version=R7x and prior; version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VLQ-0 of RV-7FLL-1Q-SH05version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VD-1 of RV-13FL-Dversion=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR760-35VD-1version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VLQ-0 of RV-7FLL-1Q-SH03version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20VQ-1 of RV-20FM-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA SQ Series Controller CR2QA-711version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7FL-1Q-SH04version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7F-1Q-SH02version=R7x and prior
Mitsubishi Electric Corporation · MELFA SD Series Controller CR2DA-751version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VD-1 of RV-13FC-Dversion=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FC-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA SD/SQ Series Controller CR3Q-711Mversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FLC-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA SD/SQ Series Controller CR2DA-741version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20HD-1 of RV-20FC-Dversion=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20HD-1 of RV-20F-Dversion=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FL-Q-SH01version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20HD-1 of RV-20F-D-SH02version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VLQ-0 of RV-7FLLM-1Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VD-1 of RV-13F-D-SH02version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20VQ-1 of RV-20F-Q-SH03version=R7x and prior
Mitsubishi Electric Corporation · MELFA SD/SQ Series Controller CR1DA-761version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7FL-1Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA CR750-02VQ-1 Controllerversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7FL-1Q-SH02version=R7x and prior
Mitsubishi Electric Corporation · MELFA SQ/SD Series Controller CR1QA-721version=R7x and prior
Mitsubishi Electric Corporation · MELFA CR750-02VD-1 Controllerversion=S7x and prior
Mitsubishi Electric Corporation · MELFA SQ/SD Series Controller CR1QA-761version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FM-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA SQ/SD Series Controller CR1QA-731version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FL-Q-SH04version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-07VQ-1 of RV-7FLM-Qversion=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-20VD-0version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20HD-1 of RV-20F-D-SH05version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VD-0version=S7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-20VQ-1 of RV-20F-Q-SH01version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR751-07VQ-0 of RV-7FL-1Q-SH03version=R7x and prior
Mitsubishi Electric Corporation · MELFA F Series Controller CR750-13VD-1 of RV-13F-D-SH05version=S7x and prior

Published CVSS scores

7.5Mitsubishi Electric CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-489Active Debug Code
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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