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CVE-2026-69805 Microsoft CVE debrief

CVE-2026-69805 is a high-severity vulnerability in .NET that allows external control of file name or path, enabling unauthorized attackers to elevate privileges over a network. This vulnerability affects .NET and Visual Studio deployments. Defenders responsible for these deployments should assess exposure and prioritize patching. The CVE record was published on 2026-09-08T18:19:52.063Z and has not been modified since then. The vulnerability has a CVSS score of 7.5 and a HIGH severity rating.

Vendor
Microsoft
Product
Microsoft Visual Studio 2022 version 17.14
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-08
Original CVE updated
2026-09-29
Advisory published
2026-09-08
Advisory updated
2026-09-29

Who should care

Defenders responsible for .NET and Visual Studio deployments should assess exposure and prioritize patching for this high-severity vulnerability. This includes reviewing and applying Microsoft patches for affected .NET and Visual Studio versions, assessing exposure and prioritizing patching for .NET and Visual Studio users, and verifying inventory of .NET and Visual Studio installations. Additionally, defenders may 1

Why it matters

CVE-2026-69805 is a high-severity vulnerability in .NET that allows external control of file name or path, enabling unauthorized attackers to elevate privileges over a network. Defenders responsible for .NET and Visual Studio deployments should assess exposure and prioritize patching.

  • Verify patch deployment for .NET and Visual Studio
  • Assess exposure of .NET and Visual Studio installations
  • Prioritize patching for high-severity vulnerabilities

Technical summary

CVE-2026-69805 is a HIGH-severity vulnerability in .NET that allows external control of file name or path, enabling unauthorized attackers to elevate privileges over a network. This vulnerability affects .NET and Visual Studio deployments. The vulnerability has a CVSS score of 7.5 and a HIGH severity rating. Official CVE Program and NVD records indicate external control of file name or path in .NET, allowing unauthorized attackers to elevate privileges over a network.

Defensive priority

Assess exposure and prioritize patching for .NET and Visual Studio users

Recommended defensive actions

  • Review and apply Microsoft patches for affected .NET and Visual Studio versions
  • Assess exposure and prioritize patching for .NET and Visual Studio users
  • Verify inventory of .NET and Visual Studio installations

Evidence notes

Official CVE Program and NVD records indicate external control of file name or path in .NET, allowing unauthorized attackers to elevate privileges over a network.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-69805 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-69805

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

  • CVE-2026-69805 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-69805

    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.