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CVE-2026-50527 Microsoft CVE debrief

A stack-based buffer overflow vulnerability exists in .NET Framework, which could allow an unauthorized attacker to cause a denial of service over a network. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. This issue is particularly concerning for organizations that rely heavily on .NET Framework for their applications and services. Administrators should be aware of the potential impact and take necessary precautions to mitigate the risk. The vulnerability is caused by a stack-based buffer overflow in .NET Framework, which can be exploited by an attacker to cause a denial of service. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Affected systems may experience service disruptions if exploited.

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
2026-07-21
Advisory published
2026-07-14
Advisory updated
2026-07-21

Who should care

Administrators and users of .NET Framework should be aware of this vulnerability and take necessary precautions to mitigate the risk. This includes reviewing and applying patches or updates provided by the vendor, monitoring .NET Framework systems for unusual activity, and implementing compensating controls to reduce the attack surface. Additionally, security teams and vulnerability management teams should prioritize patching or mitigating this vulnerability, as it could allow an attacker to cause a denial of service.

Technical summary

The vulnerability is caused by a stack-based buffer overflow in .NET Framework. An unauthorized attacker could exploit this vulnerability to cause a denial of service over a network. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. This vulnerability affects .NET Framework and may impact systems that rely on it for applications and services.

Defensive priority

High priority should be given to patching or mitigating this vulnerability, as it could allow an attacker to cause a denial of service.

Recommended defensive actions

  • Apply the patch or update provided by the vendor
  • Monitor .NET Framework systems for unusual activity
  • Implement compensating controls to reduce the attack surface
  • 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 2026-07-14T20:17:37.363Z and was last modified on 2026-07-21T00:17:21.473Z. The NVD entry is currently Awaiting Analysis. The information provided is based on the CVE record and NVD entry, which may not be comprehensive or up-to-date. Further verification and review of the vulnerability and its impact are necessary to ensure accurate understanding and effective mitigation.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-14T20:17:37.363Z and has not been modified since then. The NVD entry is currently Awaiting Analysis.