CVE-2019-4762Network attack vector

Queue-manager denial of service via channel processing

Published Apr 16, 2020 · Updated Sep 16, 2024

Denial of service in channel processing in IBM MQ 9.0 and 9.1 allows remote attackers to interrupt a queue manager over the network. The channel-processing logic mishandles unspecified network input, but IBM has not disclosed the erroneous operation or input format. No authentication or user interaction is required, although exploitation has high complexity; the documented consequence is queue-manager denial of service.

CVSS severity5.9
Medium
EPSS probability1.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in channel processing in IBM MQ 9.0 and 9.1 allows remote attackers to interrupt a queue manager over the network. The channel-processing logic mishandles unspecified network input, but IBM has not disclosed the erroneous operation or input format. No authentication or user interaction is required, although exploitation has high complexity; the documented consequence is queue-manager denial of service.

The record

CVE
CVE-2019-4762
Published
Apr 16, 2020
Updated
Sep 16, 2024
Vendor
IBM
Product
IBM MQ
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 16, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=9.0.0.0
  2. Affected versionversion=9.0.0.1
  3. Affected versionversion=9.0.0.2
  4. Affected versionversion=9.0.0.3
  5. Affected versionversion=9.0.0.4
  6. Affected versionversion=9.0.0.5
  7. Affected versionversion=9.0.0.6
  8. Affected versionversion=9.0.0.7
  9. Affected versionversion=9.0.0.8
  10. Affected versionversion=9.1.0.0
  11. Affected versionversion=9.1.0.2
  12. Affected versionversion=9.1.1
  13. Affected versionversion=9.1.2
  14. Affected versionversion=9.1.3
  15. Affected versionversion=9.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM MQversion=9.0.0.0; version=9.0.0.1; version=9.0.0.2; version=9.0.0.3; version=9.0.0.4; version=9.0.0.5; version=9.0.0.6; version=9.0.0.7; version=9.0.0.8; version=9.1.0.0; version=9.1.0.2; version=9.1.1; version=9.1.2; version=9.1.3; version=9.1.4

Published CVSS scores

5.9IBMCVSS:3.0/AV:N/AC:H/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.

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

T1499.004Application or System Exploitation

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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