PatchSiren cyber security CVE debrief
CVE-2026-70165 Microsoft CVE debrief
A .NET Elevation of Privilege Vulnerability exists due to improper link resolution before file access in .NET, allowing an authorized attacker to elevate privileges locally. This vulnerability affects multiple .NET versions, including .NET 10.0, .NET 11.0, and .NET 9.0, as well as Microsoft Visual Studio versions, such as Microsoft Visual Studio 2022 version 17.14 and Microsoft Visual Studio 2026 version 18.10. Defenders responsible for .NET and Microsoft Visual Studio deployments should assess exposure and apply patches or updates to prevent potential elevation of privilege attacks. The vulnerability allows authorized attackers to elevate privileges locally, which could lead to a
- Vendor
- Microsoft
- Product
- .NET 10.0
- CVSS
- MEDIUM 6.7
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-10-13
- Original CVE updated
- 2026-10-14
- Advisory published
- 2026-10-13
- Advisory updated
- 2026-10-14
Who should care
Defenders responsible for .NET and Microsoft Visual Studio deployments should assess exposure and apply patches or updates to prevent potential elevation of privilege attacks.
Why it matters
CVE-2026-70165 is a .NET Elevation of Privilege Vulnerability that allows authorized attackers to elevate privileges locally due to improper link resolution before file access. Defenders responsible for .NET and Microsoft Visual Studio deployments should assess exposure and apply patches or updates to prevent potential elevation of privilege attacks.
- Local elevation of privilege for authorized attackers
- Potential for attackers to gain higher privileges on affected systems
- Need for defenders to verify and apply patches or updates
- Importance of monitoring affected systems for potential exploitation attempts
Technical summary
The vulnerability exists due to improper link resolution before file access in .NET, allowing an authorized attacker to elevate privileges locally. Affected products include .NET 10.0, .NET 11.0, .NET 9.0, Microsoft Visual Studio 2022 version 17.14, and Microsoft Visual Studio 2026 version 18.10.
Defensive priority
Medium priority for defenders to assess exposure and apply patches, given the local elevation of privilege nature of the vulnerability.
Recommended defensive actions
- Assess exposure of .NET 10.0, .NET 11.0, .NET 9.0, Microsoft Visual Studio 2022 version 17.14, and Microsoft Visual Studio 2026 version 18.10 deployments
- Apply patches or updates provided by the vendor
- Verify the integrity of affected systems and monitor for potential exploitation attempts
Evidence notes
The CVE record and source item provide details on the vulnerability, including its description, affected products, and references to vendor advisories.
Sources and references
Verified primary and authoritative sources
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CVE-2026-70165 CVE Program record
Publisher, destination, and source semantics verified
URL: https://www.cve.org/CVERecord?id=CVE-2026-70165
CVE Program - Official CVE Program record with source-provided CVE metadata.
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CVE-2026-70165 NVD vulnerability detail
Publisher, destination, and source semantics verified
URL: https://nvd.nist.gov/vuln/detail/CVE-2026-70165
NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.
Supplemental references
-
.NET Elevation of Privilege Vulnerability
Unverified legacy reference
URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/70xxx/CVE-2026-70165.json
cve_program_cvelist_v5
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Source reference
Unverified legacy reference
URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70165
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.