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CVE-2026-88146 Microsoft CVE debrief

CVE-2026-88146 is a high-severity Elevation of Privilege vulnerability in Windows Background Intelligent Transfer Service (BITS). The vulnerability is caused by a concurrent execution using shared resource with improper synchronization, also known as a race condition. An authorized attacker can exploit this vulnerability locally to elevate privileges. Defenders responsible for Windows systems, particularly those using Background Intelligent Transfer Service (BITS), should assess exposure and apply patches. The CVE record was published on 2026-10-13T19:00:22.373Z and has not been modified since then.

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-13
Advisory published
2026-10-13
Advisory updated
2026-10-13

Who should care

Defenders responsible for Windows systems, particularly those using Background Intelligent Transfer Service (BITS), should assess exposure and apply patches.

Why it matters

CVE-2026-88146 is a high-severity Elevation of Privilege vulnerability in Windows Background Intelligent Transfer Service (BITS). Defenders should prioritize verifying exposure and applying patches.

  • Verify exposure of Windows systems to CVE-2026-88146
  • Apply patches from Microsoft for affected Windows versions
  • Monitor system logs for potential exploitation attempts

Technical summary

CVE-2026-88146 is a Windows Background Intelligent Transfer Service (BITS) Elevation of Privilege Vulnerability. An authorized attacker can exploit this vulnerability locally to elevate privileges by taking advantage of a concurrent execution using shared resource with improper synchronization. This vulnerability affects Windows systems using Background Intelligent Transfer Service (BITS). Defenders should prioritize verifying exposure and applying patches from Microsoft for affected Windows versions.

Defensive priority

Defenders should prioritize verifying exposure and applying patches for Windows Background Intelligent Transfer Service (BITS) Elevation of Privilege Vulnerability.

Recommended defensive actions

  • Verify exposure of Windows systems to CVE-2026-88146
  • Apply patches from Microsoft for affected Windows versions
  • Monitor system logs for potential exploitation attempts
  • Review and update incident response plans

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. However, additional information on exploitation or impact is limited. There is no evidence of public exploitation or specific attacks. The vendor has provided patches for affected Windows versions. Defenders should verify exposure and apply patches. The source item and CVE Program record provide additional context on the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-88146 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-88146

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

  • CVE-2026-88146 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-88146

    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.