CVE-2022-43919Network attack vector

Service interruption via mishandled PCF messages

Published May 5, 2023 · Updated Jan 29, 2025

Improper input validation in IBM MQ Server 9.2 CD, 9.2 LTS, 9.3 CD, and 9.3 LTS allows remote authenticated users to interrupt service. The Server component incorrectly processes crafted Programmable Command Format messages instead of safely rejecting them. The sender must authenticate and hold message-authoring authorization; exploitation interrupts MQ availability without reported data disclosure or modification.

CVSS severity5.3
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in IBM MQ Server 9.2 CD, 9.2 LTS, 9.3 CD, and 9.3 LTS allows remote authenticated users to interrupt service. The Server component incorrectly processes crafted Programmable Command Format messages instead of safely rejecting them. The sender must authenticate and hold message-authoring authorization; exploitation interrupts MQ availability without reported data disclosure or modification.

The record

CVE
CVE-2022-43919
Published
May 5, 2023
Updated
Jan 29, 2025
Vendor
IBM
Product
IBM MQ
Classifications
CWE-20, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 2025Record 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=9.2 CD, 9.2 LTS, 9.3 CD, 9.3 LTS

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM MQversion=9.2 CD, 9.2 LTS, 9.3 CD, 9.3 LTS

Published CVSS scores

5.3IBM CorporationCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

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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