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CVE-2026-49162 Microsoft CVE debrief

CVE-2026-49162 is a high-severity vulnerability in Microsoft Brokering File System, allowing an authorized attacker to elevate privileges locally. The CVE record was published on 2026-07-14T17:16:50.903Z and was last modified on 2026-07-16T16:21:57.870Z. This vulnerability is a use-after-free issue that can be exploited to gain local privilege escalation. System administrators and security teams should be aware of this vulnerability and take necessary actions to mitigate it. The CVSS score for this vulnerability is 7, indicating a high severity level. The vulnerability affects multiple versions of Microsoft Windows, including Windows 11 24H2, Windows 11 25H2, and Windows Server 2025. To address this vulnerability, it is essential to apply the patch provided by Microsoft and implement compensating controls to limit the attack surface.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

System administrators and security teams responsible for managing Microsoft Windows systems should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is a use-after-free issue in the Microsoft Brokering File System. An authorized attacker can exploit this vulnerability to elevate privileges locally. The CVSS score for this vulnerability is 7, indicating a high severity level. The CVSS vector is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Defensive priority

High

Recommended defensive actions

  • Apply the patch provided by Microsoft
  • Conduct a thorough inventory of affected systems
  • Implement compensating controls to limit the attack surface
  • Monitor system logs for suspicious activity
  • Consider implementing additional security measures to prevent local privilege escalation

Evidence notes

The CVE record was published on 2026-07-14T17:16:50.903Z and was last modified on 2026-07-16T16:21:57.870Z. The NVD entry is currently Analyzed. The vulnerability affects multiple versions of Microsoft Windows, including Windows 11 24H2, Windows 11 25H2, and Windows Server 2025. However, the exact scope of affected systems and potential impact is still being verified. Defenders should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance. Additional verification tasks may be necessary to confirm the presence of affected product deployments in managed environments.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49162 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49162

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

  • CVE-2026-49162 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49162

    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.