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CVE-2026-83893 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-10-13T18:59:55.767Z and has not been modified since then. The NVD entry is currently unclassified. The Windows Clipboard User Service Information Disclosure Vulnerability allows an authorized attacker to disclose information locally. Defenders should verify exposure and apply patches from Microsoft. The vulnerability affects Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2019, Windows 2019

Vendor
Microsoft
Product
Windows 10 Version 1809
CVSS
MEDIUM 5.5
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 Clipboard User Service deployments should assess exposure and apply patches from Microsoft. This includes verifying exposure in Windows Clipboard User Service deployments, applying patches from Microsoft to prevent information disclosure, and monitoring system information disclosure. Defenders should prioritize verifying exposure and applying patches.

Why it matters

The Windows Clipboard User Service Information Disclosure Vulnerability allows an authorized attacker to disclose information locally. Defenders should verify exposure and apply patches from Microsoft.

  • Verify exposure in Windows Clipboard User Service deployments
  • Apply patches from Microsoft to prevent information disclosure
  • Monitor system information disclosure

Technical summary

The Windows Clipboard User Service Information Disclosure Vulnerability allows an authorized attacker to disclose information locally. Affected versions include Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2025, and Windows Server 2025 (Server Core installation).

Defensive priority

Defenders should prioritize verifying exposure in Windows Clipboard User Service deployments and applying patches from Microsoft.

Recommended defensive actions

  • Verify exposure in Windows Clipboard User Service deployments
  • Apply patches from Microsoft
  • Monitor system information disclosure

Evidence notes

The CVE record and NVD entry provide details on the Windows Clipboard User Service Information Disclosure Vulnerability. Microsoft has provided a patch for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-83893 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-83893

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

  • CVE-2026-83893 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-83893

    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.