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

Source: https://junglewise.ai/threats/cve-2017-8759-microsoft-net-framework-remote-code-execution-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2017-8759 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2021-11-03

Microsoft .NET Framework contains a remote code execution vulnerability when processing untrusted input via malicious documents or applications. An attacker who successfully exploits this vulnerability could take complete control of an affected system.

Technologies: [Microsoft .NET Framework](https://junglewise.ai/threats/technologies/net-framework). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2017-8759 exploited in the wild?** Yes. CVE-2017-8759 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2017-8759?** Critical severity, with a CVSS score of 7.8, published 3 November 2021.

**Which products and versions are affected?** Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7.

**Is there a fix for CVE-2017-8759?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2017-8759 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2017-8759?** Check whether you run Microsoft .NET Framework. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7

## Timeline

- 2017-09-12: advisory: MSRC advisory published
- 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2021-11-03: disclosed: NVD publication date

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