CVE-2022-21194

Unauthorized access via default Windows passwords

Published Mar 11, 2022 · Updated Aug 3, 2024

Use of hard-coded credentials in Yokogawa CENTUM VP and Exaopc allows remote attackers to access systems via adjacent-network login. Installation leaves internal Windows account passwords at their initial defaults. An attacker able to reach the host on the adjacent network and authenticate with those credentials can access files and shared memory, with confidentiality, integrity, and availability impact.

CVSS severity7.1
High
EPSS probability0.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of hard-coded credentials in Yokogawa CENTUM VP and Exaopc allows remote attackers to access systems via adjacent-network login. Installation leaves internal Windows account passwords at their initial defaults. An attacker able to reach the host on the adjacent network and authenticate with those credentials can access files and shared memory, with confidentiality, integrity, and availability impact.

The record

CVE
CVE-2022-21194
Published
Mar 11, 2022
Updated
Aug 3, 2024
Vendor
Yokogawa Electric Corporation
Product
Exaopc
Classifications
CWE-798, T1078
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 11, 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?

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

  1. Affected versionversion=versions from R3.72.00 to R3.79.00

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Yokogawa Electric Corporation · Exaopcversion=versions from R3.72.00 to R3.79.00
Yokogawa Electric Corporation · CENTUM VPversion=versions from R5.01.00 to R5.04.20; version=versions from R6.01.00 to R6.08.00

Published CVSS scores

7.1Yokogawa Electric CorporationCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078Valid Accounts

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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