Security readout for executives and security teams
Plain-English summary
CVE-2019-4261 is a denial-of-service issue in multiple IBM MQ and WebSphere MQ releases. A specially crafted message can disrupt availability. The provided sources do not describe data theft or data modification impact. Business urgency depends on whether affected MQ versions process messages from low-privileged or less-trusted users.
Executive priority
Treat as a moderate availability risk. Remediate in normal patch cycles, faster for business-critical MQ infrastructure or externally reachable messaging paths.
Technical view
IBM MQ versions 8.0.0.0 through 8.0.0.11, 9.0.0.0 through 9.0.0.6, and 9.1 LTS/CD releases listed in the bundle are affected. CVSS v3.0 score is 4.3, with network attack vector, low complexity, low privileges required, no confidentiality or integrity impact, and denial-of-service availability impact.
Likely exposure
Exposure is most likely where IBM MQ queue managers or channels accept messages from low-privileged users, partner systems, applications, or network-accessible clients running affected versions.
Exploitation context
The bundle marks CISA KEV as false and CVSS exploit maturity as unproven. No cited source in the bundle states active exploitation. The public description only says specially crafted messages can cause denial of service.
Researcher notes
Evidence is limited to IBM, CVE, and X-Force records. The bundle does not provide CWE mapping, CPEs, fixed release identifiers, message format details, or exploit procedure. Avoid assuming affected products beyond IBM MQ/WebSphere MQ versions listed.
Mitigation direction
- Identify all IBM MQ and WebSphere MQ instances and versions.
- Review IBM advisory 10886887 for vendor-specified fixes or workarounds.
- Prioritize internet-facing, partner-facing, and shared MQ environments.
- Restrict MQ message submission to trusted authenticated applications where possible.
- Monitor queue manager availability and abnormal channel or message failures.
Validation and detection
- Compare installed MQ versions against the affected version list in the CVE bundle.
- Confirm whether low-privileged users or applications can send messages to affected queue managers.
- Check IBM X-Force entry 160013 and advisory 10886887 for current remediation guidance.
- Review operational monitoring for unexplained MQ service disruption or repeated malformed-message errors.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2019-4261 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/UI:N/A:L/C:N/I:N/AC:L/AV:N/S:U/PR:L/RL:O/RC:C/E:U
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/UI:N/A:L/C:N/I:N/AC:L/AV:N/S:U/PR:L/RL:O/RC:C/E:U2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.3MediumVector: CVSS:3.0/UI:N/A:L/C:N/I:N/AC:L/AV:N/S:U/PR:L/RL:O/RC:C/E:U
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/docview.wss?uid=ibm10886887CVE reference · x_refsource_CONFIRM
- ibm-mq-cve20194261-dos (160013)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.