CVE-2022-26034

Data leakage and tampering via unauthenticated AD protocol

Published Apr 15, 2022 · Updated Aug 3, 2024

Improper authentication in the AD Server communication protocol in Yokogawa CENTUM VP R6.01.10 through R6.09.00 allows remote attackers to use AD functions. The protocol accepts function requests without sufficient authentication, exposing operations that can leak or tamper with AD-managed data. The advisory describes an adjacent-network attack with no credentials or user interaction; impact is confidentiality and integrity loss without reported service interruption.

CVSS severity6.4
Medium
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in the AD Server communication protocol in Yokogawa CENTUM VP R6.01.10 through R6.09.00 allows remote attackers to use AD functions. The protocol accepts function requests without sufficient authentication, exposing operations that can leak or tamper with AD-managed data. The advisory describes an adjacent-network attack with no credentials or user interaction; impact is confidentiality and integrity loss without reported service interruption.

The record

CVE
CVE-2022-26034
Published
Apr 15, 2022
Updated
Aug 3, 2024
Vendor
Yokogawa Electric Corporation
Product
CENTUM VP
Classifications
CWE-287
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 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?

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

  1. Affected versionversion=CENTUM VP R6.01.10 to R6.09.00, CENTUM VP Small R6.01.10 to R6.09.00, CENTUM VP Basic R6.01.10 to R6.09.00, and B/M9000 VP R8.01.01 to R8.03.01

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Yokogawa Electric Corporation · CENTUM VPversion=CENTUM VP R6.01.10 to R6.09.00, CENTUM VP Small R6.01.10 to R6.09.00, CENTUM VP Basic R6.01.10 to R6.09.00, and B/M9000 VP R8.01.01 to R8.03.01

Published CVSS scores

9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4Yokogawa Electric CorporationCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L

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-287Improper Authentication

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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