CVE-2020-0813 — Scripting Engine Information Disclosure Vulnerability

Executive Summary

An information disclosure vulnerability exists when Chakra improperly discloses the contents of its memory, which could provide an attacker with information to further compromise the user’s computer or data. To exploit the vulnerability, an attacker must know the memory address of where the object was created. The update addresses the vulnerability by changing the way certain functions handle objects in memory.

Overview

7.5

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Information Disclosure

Released Mar 10 2020

Last Updated Mar 10 2020

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.05326 — 0.91559 percentile

NVD CVSS 7.5 HIGH — differs from MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

Low

INTEGRITY

None

AVAILABILITY

None

EXPLOIT CODE MATURITY

Proof-of-Concept

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 3.9

EPSS Score

0.05326

probability of exploitation in the next 30 days

0.91559 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

17 affected products

Product	KB Article	Severity	Impact	Restart Required
ChakraCore	`Release Notes (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems	`4540681 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for ARM64-based Systems	`4540681 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems	`4540681 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems	`4540689 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems	`4540689 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems	`4540689 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems	`4538461 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems	`4538461 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems	`4538461 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for 32-bit Systems	`4540673 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for ARM64-based Systems	`4540673 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for x64-based Systems	`4540673 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for 32-bit Systems	`4540673 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for ARM64-based Systems	`4540673 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for x64-based Systems	`4540673 (Security Update)`	Important	Information Disclosure	Yes
Microsoft Edge (EdgeHTML-based) on Windows Server 2019	`4538461 (Security Update)`	Low	Information Disclosure	Yes

Patches

5 patches

Article	Type	Restart
`Release Notes`	Security Update	Maybe
`4540681`	Security Update	Yes
`4540689`	Security Update	Yes
`4538461`	Security Update	Yes
`4540673`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Tencent Security Xuanwu Lab

References

MSRC Advisory MITRE NVD