CVE-2026-50646: .NET Framework Remote Code Execution Vulnerability

highCVSS 7.8CVE-2026-50646

Protection mechanism failure in .NET Framework allows an unauthorized attacker to execute code locally.

CSIRTS triage

vendor: Microsoft product: .NET Framework Remote code execution

What: Protection mechanism failure in .NET Framework allows an unauthorized attacker to execute code locally.
Who is affected: Unauthorized users targeting .NET Framework applications are affected.
Urgency: Remediation is urgent due to the high severity and potential for remote code execution.
Action: Apply the latest security patch for .NET Framework.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50646

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-506460.95% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 58% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50646	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] Microsoft DeveloperTools: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Microsoft .Net (July 15, 2026)cert-fr-avis
highCVE-2026-50646: Protection mechanism failure in .NET Framework allows an unauthorized attacker to execute code…nvd
unknownNCSC-2026-0235 [1.00] [M/H] Vulnerabilities fixed in Microsoft Developer Toolsncsc-nl

Recent advisories for .NET Framework Remote

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalexploitedCVE-2020-1147: Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerabilitycisa-kev · 2021-11-03
criticalexploitedCVE-2017-8759: Microsoft .NET Framework Remote Code Execution Vulnerabilitycisa-kev · 2021-11-03
criticalexploitedCVE-2020-0646: Microsoft .NET Framework Remote Code Execution Vulnerabilitycisa-kev · 2021-11-03