CVE-2026-50527: .NET Framework Denial of Service Vulnerability

highCVSS 7.5CVE-2026-50527

Stack-based buffer overflow in .NET Framework allows an unauthorized attacker to deny service over a network.

CSIRTS triage

vendor: Microsoft product: .NET Framework Denial of service

What: Stack-based buffer overflow in .NET Framework allows an unauthorized attacker to deny service over a network.
Who is affected: Deployments of .NET Framework.
Urgency: Remediation is urgent due to the high severity and potential for denial of service.
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 7.5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50527

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-2026-505270.84% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 54% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50527	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
highGHSA-mmjf-rqrv-855v: Microsoft Security Advisory CVE-2026-50527 – .NET Denial of Service Vulnerabilityghsa
unknownUSN-8553-1: .NET vulnerabilitiesubuntu
unknownMultiple vulnerabilities in Microsoft products (July 15, 2026)cert-fr-avis
unknownMultiple vulnerabilities in Microsoft .Net (July 15, 2026)cert-fr-avis
highCVE-2026-50527: Stack-based buffer overflow in .NET Framework allows an unauthorized attacker to deny service …nvd
unknownNCSC-2026-0235 [1.00] [M/H] Vulnerabilities fixed in Microsoft Developer Toolsncsc-nl

Recent advisories for .NET Framework Denial

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.

highCVE-2026-50524: .NET Framework Denial of Service Vulnerabilitymsrc · 2026-07-14
highCVE-2026-50648: .NET Framework Denial of Service Vulnerabilitymsrc · 2026-07-14