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Vulnerabilities

Vulnerability · CVE-2017-8759

Microsoft .NET Framework Remote Code Execution Vulnerability

Published Sep 12, 2017 · catalog updated Jun 16, 2026 · Microsoft .NET Framework

Patch now

CVE-2017-8759 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Microsoft .NET Framework against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High7.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
88.70%
Remediation
Remediation guidance
Affected products
cpe microsoft/.net framework · vendor Microsoft .NET Framework

Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to execute code remotely via a malicious document or application, aka ".NET Framework Remote Code Execution Vulnerability."

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/.net framework2.0
  • cpe microsoft/.net framework3.5
  • cpe microsoft/.net framework3.5.1
  • cpe microsoft/.net framework4.5.2
  • cpe microsoft/.net framework4.6
  • cpe microsoft/.net framework4.6.1
  • cpe microsoft/.net framework4.6.2
  • cpe microsoft/.net framework4.7
  • vendor Microsoft .NET Frameworkversion unspecified

How to fix CVE-2017-8759

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2017-8759 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Microsoft .NET Framework against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with microsoft/.net framework 2.0; microsoft/.net framework 3.5; microsoft/.net framework 3.5.1; microsoft/.net framework 4.5.2. Apply updates per vendor instructions.

What should an analyst verify?

CWE-20: Improper Input Validation; CWE-94: Code Injection. EPSS 88.70%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 12, 2017 · Catalog

    Detected

    Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to execute code remotely via a malicious document or application, aka ".NET Framework Remote Code Execution Vulnerability."

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 3, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to execute code remotely via a malicious document or application, aka ".NET Framework Remote Code Execution Vulnerability."

Sources

  • CISA KEVConfirmed exploitationCVE-2017-8759

    Microsoft .NET Framework contains a remote code execution vulnerability when processing untrusted input that could allow an attacker to take control of an affected system.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2017-8759

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2017-8759

    30-day exploitation probability 88.7%

    first.org
  • Exploit DatabasePublic exploit reference42711

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • NIST NVDVulnerability recordCVE-2017-8759

    Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to execute code remotely via a malicious document or application, aka ".NET Framework Remote Code Execution Vulnerability."

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2017-8759

    Microsoft .NET Framework contains a remote code execution vulnerability when processing untrusted input that could allow an attacker to take control of an affected system.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.