CVE-2022-25161Public exploitNetwork attack vector

Program stoppage via device-offset integer overflow

Published May 18, 2022 · Updated Aug 3, 2024

Improper input validation in Mitsubishi Electric MELSEC iQ-F CPU module firmware allows remote attackers to halt program execution or communications. The DevOff_To_RealAddr function multiplies an attacker-supplied device offset by the unit size before validating the result, permitting integer wraparound to a null real address. Unauthenticated network access is sufficient; crafted protocol packets put the PLC in an error state, stop its control program, and require a system reset.

CVSS severity8.6
High
EPSS probability4.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in Mitsubishi Electric MELSEC iQ-F CPU module firmware allows remote attackers to halt program execution or communications. The DevOff_To_RealAddr function multiplies an attacker-supplied device offset by the unit size before validating the result, permitting integer wraparound to a null real address. Unauthenticated network access is sufficient; crafted protocol packets put the PLC in an error state, stop its control program, and require a system reset.

The record

CVE
CVE-2022-25161
Published
May 18, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C
8.6Mitsubishi ElectricCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T0814Denial of Service

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo