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CVE-2026-50649: .NET Remote Code Execution Vulnerability

highCVSS 7.8CVE-2026-50649
Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally.

CSIRTS triage

vendor: Microsoftproduct: .NETRemote code execution
What
An unauthorized attacker can execute code locally due to deserialization of untrusted data.
Who is affected
Deployments of .NET are affected.
Urgency
Remediation is important due to high severity and potential for remote code execution.
Action
Patch to the latest version of .NET to address this vulnerability.

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-2026-50649

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-50649coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for .NET Remote Code

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.

More from Microsoft Security Response Center