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Critical Vulnerabilities in .NET and BeyondTrust Allow Remote Code Execution

Critical Vulnerabilities in .NET and BeyondTrust Allow Remote Code Execution

First seen 28 Oct 2026, 12:09 UTC • •

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ThreatCluster AI
ThreatCluster •October 28, 2026 at 15:09 UTC
  • •CVE-2026-96237 affects .NET versions 8.0, 9.0, and 10.0 with a CVSS of 7.5.
  • •CVE-2026-1731 in BeyondTrust products allows unauthenticated remote code execution with a CVSS of 9.9.
  • •Immediate action is required for both vulnerabilities to prevent potential exploitation.

Two significant vulnerabilities have been reported recently. CVE-2026-96237, a .NET Remote Code Execution vulnerability, affects systems running .NET 8.0, 9.0, or 10.0 and has a CVSS score of 7.5. Exploitation is deemed less likely due to high attack complexity and required user interaction. In contrast, CVE-2026-1731 in BeyondTrust products allows unauthenticated attackers to execute arbitrary commands with a CVSS score of 9.9, making it critical. This flaw impacts BeyondTrust Remote Support and Privileged Remote Access systems, enabling full control without authentication. Both vulnerabilities require prompt attention from affected organizations to mitigate risks.

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Timeline

2026-02-06
CVE-2026-1731 published
BeyondTrust announced a critical vulnerability allowing pre-auth remote code execution.
Esecurityplanet
2026-02-13
CVE-2026-1731 added to CISA KEV
CISA included CVE-2026-1731 in its Known Exploited Vulnerabilities catalog due to active exploitation.
Esecurityplanet
2026-10-13
CVE-2026-96237 published
Microsoft disclosed a .NET Remote Code Execution vulnerability affecting versions 8.0 to 10.0.
Windowsforum

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Common questions

Which .NET versions are affected?
CVE-2026-96237 affects .NET versions 8.0, 9.0, and 10.0.
Is CVE-2026-1731 being exploited?
Yes, it has been confirmed that CVE-2026-1731 is actively exploited in the wild.
What should organizations do?
Organizations should prioritize patching affected systems and implementing security measures to limit exposure.