CVE-2022-31206Network attack vector

Unauthenticated PLC code execution via forged downloads

Published Jul 26, 2022 · Updated Aug 3, 2024

Insufficient verification of data authenticity in Omron SYSMAC Nx PLCs through 2022-005-18 allows remote attackers to execute arbitrary machine code. The PLC accepts downloaded logic without cryptographic authentication, allowing object code to be altered in transit before execution by the CPU runtime. Network reachability is required, but no PLC protection password is needed; consequences include arbitrary code execution and denial of service, while privilege separation limits remain unconfirmed.

CVSS severity4.4
Medium
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient verification of data authenticity in Omron SYSMAC Nx PLCs through 2022-005-18 allows remote attackers to execute arbitrary machine code. The PLC accepts downloaded logic without cryptographic authentication, allowing object code to be altered in transit before execution by the CPU runtime. Network reachability is required, but no PLC protection password is needed; consequences include arbitrary code execution and denial of service, while privilege separation limits remain unconfirmed.

The record

CVE
CVE-2022-31206
Published
Jul 26, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-347, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 26, 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

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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

4.4CISACVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 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-347Improper Verification of Cryptographic Signature
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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