CVE-2022-33939

ADL communication stoppage via malformed packets

Published Aug 16, 2022 · Updated Aug 3, 2024

Resource exhaustion in Yokogawa CENTUM VP controller FCS revisions allows remote attackers to stop ADL communication with malformed packets. The FCS packet-processing path consumes controller resources when it handles malformed ADL traffic; Yokogawa has not disclosed the exact parsing defect. Exploitation requires access to the adjacent control network and interrupts ADL communications, without reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Yokogawa CENTUM VP controller FCS revisions allows remote attackers to stop ADL communication with malformed packets. The FCS packet-processing path consumes controller resources when it handles malformed ADL traffic; Yokogawa has not disclosed the exact parsing defect. Exploitation requires access to the adjacent control network and interrupts ADL communications, without reported data disclosure or modification.

The record

CVE
CVE-2022-33939
Published
Aug 16, 2022
Updated
Aug 3, 2024
Vendor
Yokogawa Electric Corporation
Product
CENTUM VP
Classifications
CWE-399, T0814
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 16, 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=CP31, CP33, CP345, CP401, CP451

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Yokogawa Electric Corporation · CENTUM VPversion=CP31, CP33, CP345, CP401, CP451

Published CVSS scores

7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5Yokogawa Electric CorporationCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/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.

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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-399Resource Management Errors
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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