PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-54992 Microsoft CVE debrief

A heap-based buffer overflow vulnerability exists in the Windows Message Queuing Queue Manager, allowing an unauthorized attacker to execute code locally. The vulnerability has a CVSS score of 8.4 and is classified as HIGH severity. This vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. The vulnerability is caused by improper handling of messages in the Windows Message Queuing Queue Manager, which can lead to a heap-based buffer overflow. An attacker can exploit this vulnerability to execute code locally without requiring user interaction.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 8.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-20
Advisory published
2026-07-14
Advisory updated
2026-07-20

Who should care

System administrators and users of Windows operating systems should be aware of this vulnerability, especially if they have not applied the necessary patches. This vulnerability can be exploited by an unauthorized attacker to execute code locally, which can lead to a compromise of the system. Affected operators, platforms, and security teams should prioritize patching and review system configurations.

Technical summary

The vulnerability is caused by a heap-based buffer overflow in the Windows Message Queuing Queue Manager. This allows an attacker to execute code locally without requiring user interaction. The vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, and Windows Server. The Windows Message Queuing Queue Manager does not properly handle messages, leading to a heap-based buffer overflow.

Defensive priority

High priority should be given to applying patches for this vulnerability, as it allows for local code execution. System administrators should ensure that Windows operating systems and related software are up-to-date and monitor system logs for suspicious activity.

Recommended defensive actions

  • Apply patches provided by Microsoft
  • Ensure Windows operating systems and related software are up-to-date
  • Monitor system logs for suspicious activity
  • Implement additional security measures such as firewall rules and intrusion detection systems
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-07-14T17:17:06.830Z and was last modified on 2026-07-20T15:05:31.827Z. The NVD entry is currently Analyzed. The vulnerability has a CVSS score of 8.4 and is classified as HIGH severity. The Windows Message Queuing Queue Manager is affected, and an unauthorized attacker can exploit this vulnerability to execute code locally. Evidence is limited to CVE and NVD details, and defenders should verify system configurations and patch status.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-54992 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-54992

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-54992 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-54992

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.