CVE-2017-8759VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2017-8759: Microsoft .NET Framework Remote Code Execution Vulnerability

Affects Microsoft .NET FrameworkSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
EPSS: 88.7% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2017-8759 (opens in a new tab)

Description

CVE-2017-8759 is a remote code execution vulnerability in Microsoft .NET Framework that occurs when processing untrusted input. This flaw allows an attacker to potentially take control of an affected system. The vulnerability has been exploited in the wild, indicating active threat usage. No specific affected versions or patch information is provided in the available data.

Summary

Microsoft .NET Framework contains a remote code execution vulnerability identified as CVE-2017-8759. The vulnerability arises from improper handling of untrusted input, enabling attackers to execute arbitrary code remotely. This vulnerability has been observed in active exploitation campaigns. The input data does not specify affected versions or remediation details.

Impact

Successful exploitation of this vulnerability allows an attacker to execute arbitrary code remotely on the affected system, potentially leading to full system compromise. The vulnerability has been exploited in the wild, confirming its practical risk.

Mitigation

Patch status is not yet confirmed — check the Microsoft vendor advisory for current remediation guidance. Until official fixes are confirmed, users should monitor vendor communications and apply any recommended updates promptly.

Weaknesses

CWE-20Improper Input Validation (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:11:55 UTC

Weaknesses

References

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