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CVE-2026-70348 Microsoft CVE debrief

A Windows Management Services vulnerability allows an authorized local attacker to cause a denial of service. Microsoft has released an advisory and patch for affected Windows 11 versions. The vulnerability is caused by improper link resolution before file access, allowing an authorized local attacker to cause a denial of service. Affected systems include Windows 11 Version 24H2, Windows 11 Version 25H2, and Windows 11 version 26H1. System administrators and security teams should assess exposure and apply patches to prevent local denial of service attacks.

Vendor
Microsoft
Product
Windows 11 Version 24H2
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-10-08
Advisory published
2026-08-11
Advisory updated
2026-10-08

Who should care

System administrators and security teams responsible for Windows 11 systems should assess exposure and apply patches to prevent local denial of service attacks.

Why it matters

CVE-2026-70348 is a denial of service vulnerability in Windows Management Services that requires patching for affected Windows 11 versions to prevent local attacks.

  • Denial of service attacks may occur if the vulnerability is exploited by an authorized local attacker.
  • System administrators must verify and apply patches for affected Windows 11 versions.
  • Security teams should monitor system logs for potential attacks.

Technical summary

The Windows Management Services vulnerability (CVE-2026-70348) is caused by improper link resolution before file access, allowing an authorized local attacker to cause a denial of service. Affected systems include Windows 11 Version 24H2, Windows 11 Version 25H2, and Windows 11 version 26H1.

Defensive priority

Apply patches for affected Windows 11 versions to prevent local denial of service attacks.

Recommended defensive actions

  • Apply patches for affected Windows 11 versions
  • Verify system configurations and update as necessary
  • Monitor system logs for potential attacks

Evidence notes

The CVE record and Microsoft advisory provide details on the vulnerability and affected systems. The vulnerability requires patching for affected Windows 11 versions to prevent local attacks. Denial of service attacks may occur if the vulnerability is exploited by an authorized local attacker. System administrators must verify and apply patches for affected Windows 11 versions. Security teams should monitor system logs for potential attacks.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-70348 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-70348

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

  • CVE-2026-70348 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-70348

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

Supplemental references

  • Windows Management Services Denial of Service Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/70xxx/CVE-2026-70348.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70348

    Supplemental source - vendor-advisory, patch

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.