PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-50651 Microsoft CVE debrief

A high-severity vulnerability was found in .NET, allowing an unauthorized attacker to deny service over a network. The vulnerability has a CVSS score of 7.5 and is classified as HIGH. Microsoft .NET versions 8.0.0 to 8.0.29, 9.0.0 to 9.0.18, and 10.0.0 to 10.0.6 are affected. Microsoft has released patches for this vulnerability. The vulnerability is caused by the allocation of resources without limits or throttling in .NET. This allows an attacker to consume excessive resources, leading to a denial-of-service condition.

Vendor
Microsoft
Product
.NET 10.0
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-22
Advisory published
2026-07-14
Advisory updated
2026-07-22

Who should care

System administrators and developers using .NET versions 8.0.0 to 8.0.29, 9.0.0 to 9.0.18, and 10.0.0 to 10.0.6 should apply the patches immediately to prevent potential denial-of-service attacks. Operators, platform managers, vulnerability management teams, and security teams should review the vulnerability and apply patches or mitigations as necessary.

Technical summary

The vulnerability is caused by the allocation of resources without limits or throttling in .NET. This allows an attacker to consume excessive resources, leading to a denial-of-service condition. The vulnerability has been analyzed and has a CVSS vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Affected product context includes .NET versions 8.0.0 to 8.0.29, 9.0.0 to 9.0.18, and 10.0.0 to 10.0.6.

Defensive priority

High

Recommended defensive actions

  • Apply patches for .NET versions 8.0.0 to 8.0.29, 9.0.0 to 9.0.18, and 10.0.0 to 10.0.6
  • Restrict access to .NET applications to authorized users only
  • Monitor .NET application performance and resource usage
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-14T20:17:38.387Z and was last modified on 2026-07-22T21:17:42.163Z. The NVD entry is currently Analyzed. The vulnerability affects .NET versions 8.0.0 to 8.0.29, 9.0.0 to 9.0.18, and 10.0.0 to 10.0.6. Microsoft has released patches for this vulnerability. Defenders should verify the affected scope and apply patches accordingly.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T20:17:38.387Z and has not been modified since then. The NVD entry is currently Analyzed.