What’s Vulnerable › Vulnerabilities

CVE-2020-1065: Scripting Engine Memory Corruption Vulnerability

• Severity: medium (CVSS 4.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-21 · updated 2026-08-19
• Weakness: CWE-787

Description

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 products

• Microsoft ChakraCore: before 1.11.19 — fixed in 1.11.19
• Microsoft Edge: all versions
• Microsoft ChakraCore: before publication — fixed in publication
• Microsoft Edge: from 1.0..0 before publication — fixed in publication

How to fix

Upgrade to a fixed version: Microsoft ChakraCore 1.11.19; Microsoft ChakraCore publication; Microsoft Edge publication. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1065
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1065

Get alerted when CVE-2020-1065 or the next vulnerability affects your stack