---
id: CVE-2020-1065
title: >-
  A remote code execution vulnerability exists in the way that the ChakraCore
  scripting engine handles objects in memory
summary: >-
  A remote code execution vulnerability exists in the way that the ChakraCore
  scripting engine handles objects in memory. The vulnerability could corrupt
  memory in such a way that an attacker could execute arbitrary code in the
  context of …
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-787
vendor: microsoft
product: chakracore
affected:
  - chakracore < 1.11.19
  - edge
patched:
  - chakracore 1.11.19
published: '2020-05-21'
updated: '2026-08-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-1065'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1065'
    label: secure@microsoft.com
  - url: >-
      https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1065
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.02165
epssPercentile: 0.81461
ingestedAt: '2026-08-19T17:42:36.825Z'
---

## Overview

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user.
If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
The security update addresses the vulnerability by modifying how the ChakraCore scripting engine handles objects in memory.

## Affected

- `chakracore < 1.11.19`
- `edge`

## Remediation

Upgrade past the affected range:

- `chakracore 1.11.19`