CVE-2026-57108: .NET Denial of Service Vulnerability

highCVSS 7.5CVE-2026-57108

Access of resource using incompatible type ('type confusion') in .NET Core allows an unauthorized attacker to deny service over a network.

CSIRTS triage

vendor: Microsoft product: .NET Core Denial of service

What: Access of resource using incompatible type allows an unauthorized attacker to deny service over a network.
Who is affected: Users of .NET Core applications.
Urgency: Remediation is urgent due to high severity and potential for denial of service.
Action: Update to the latest version of .NET Core to resolve the issue.

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-2026-57108

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.

Moderate exploitation riskCVE-2026-571081.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 63% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-57108	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

Recent advisories for .NET Denial of

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.

highGHSA-6588-8gv4-xfgh: Microsoft Security Advisory CVE-2026-32203 – .NET and Visual Studio Denial of Service Vul…ghsa · 2026-07-28
highGHSA-j8gr-8fp3-5q5h: Microsoft Security Advisory CVE-2026-56170 – .NET Denial of Service Vulnerabilityghsa · 2026-07-21
highGHSA-mmjf-rqrv-855v: Microsoft Security Advisory CVE-2026-50527 – .NET Denial of Service Vulnerabilityghsa · 2026-07-21
highGHSA-wp74-jgxh-gv4q: Microsoft Security Advisory CVE-2026-50651 – .NET Denial of Service Vulnerabilityghsa · 2026-07-20
highGHSA-8q5v-6pqq-x66h: Microsoft Security Advisory CVE-2026-50525 – .NET Denial of Service Vulnerabilityghsa · 2026-07-20
highGHSA-23rf-6693-g89p: Microsoft Security Advisory CVE-2026-50648 – .NET Denial of Service Vulnerabilityghsa · 2026-07-20