CVE-2017-8759
Microsoft .NET Framework Remote Code Execution Vulnerability
- High 7.8
- Exploited: added to CISA KEV 3 Nov 2021
- A public exploit reference is listed
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."
Key facts
- Published
- 13 Sep 2017
- Last changed
- 21 Oct 2025
- Assigned by
- microsoft
- KEV added
- 3 Nov 2021
- KEV fix due
- 3 May 2022
- EPSS
- 88.698% likely to be exploited in the next 30 days, higher than 99.778% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 7.8CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft Corporation | Microsoft .NET Framework |
|
Timeline
- 13 Sep 2017 Published
- 3 Nov 2021 CVE-2017-8759 added to CISA KEV
- 3 Nov 2021 Added to the CISA KEV catalogue