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PatchSiren cyber security CVE debrief

CVE-2026-62901 Microsoft CVE debrief

A .NET Denial of Service Vulnerability exists due to unchecked input for loop condition, allowing an unauthorized attacker to deny service over a network. This CVE was published on 2026-08-11T17:04:41.393Z and was last modified on 2026-10-08T18:11:03.083Z. The vulnerability affects .NET 10.0, .NET 8.0, .NET 9.0, Microsoft Visual Studio 2022 version 17.14, and Microsoft Visual Studio 2026 version 18.8. Defenders should assess exposure and prioritize patching to prevent potential denial of service attacks. The CVE record and source item provide details on the vulnerability, but do not specify if exploitation has occurred or what the exact impact may be.

Vendor
Microsoft
Product
.NET 10.0
CVSS
HIGH 7.5
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

Defenders responsible for .NET and Microsoft Visual Studio systems should assess exposure and prioritize patching to prevent potential denial of service attacks.

Why it matters

Defenders should prioritize patching .NET and Microsoft Visual Studio systems to prevent potential denial of service attacks due to the .NET Denial of Service Vulnerability.

  • Potential denial of service attacks over a network
  • Need to verify and patch affected .NET and Microsoft Visual Studio systems

Technical summary

The .NET Denial of Service Vulnerability occurs due to unchecked input for loop condition, allowing an unauthorized attacker to deny service over a network. Affected products include .NET 10.0, .NET 8.0, .NET 9.0, Microsoft Visual Studio 2022 version 17.14, and Microsoft Visual Studio 2026 version 18.8.

Defensive priority

Defenders should prioritize patching .NET 10.0, .NET 8.0, .NET 9.0, Microsoft Visual Studio 2022 version 17.14, and Microsoft Visual Studio 2026 version 18.8 systems to prevent potential denial of service attacks.

Recommended defensive actions

  • Patch .NET 10.0 systems to version 10.0.11 or later
  • Patch .NET 8.0 systems to version 8.0.30 or later
  • Patch .NET 9.0 systems to version 9.0.19 or later
  • Patch Microsoft Visual Studio 2022 version 17.14 to version 17.14.38 or later
  • Patch Microsoft Visual Studio 2026 version 18.8 to version 18.8.3 or later

Evidence notes

The CVE record and source item provide details on the vulnerability, but do not specify if exploitation has occurred or what the exact impact may be. Microsoft has provided an advisory for this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-62901 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-62901

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

  • CVE-2026-62901 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-62901

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

Supplemental references

  • .NET Denial of Service Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/62xxx/CVE-2026-62901.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62901

    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.