CVE-2022-41128Known exploitationNetwork attack vector

Remote code execution via JIT type confusion

Published Nov 9, 2022 · Updated Aug 10, 2026

Remote code execution in JScript9 on affected Microsoft Windows releases allows remote attackers to execute code through crafted web content. An incorrect JIT optimization in jscript9.dll confuses object types while processing attacker-controlled JavaScript, enabling memory corruption and arbitrary code execution. Exploitation requires the content to be rendered; observed Office delivery also required the user to disable Protected View before a remote template loaded.

CVSS severity8.8
High
EPSS probability24.62%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in JScript9 on affected Microsoft Windows releases allows remote attackers to execute code through crafted web content. An incorrect JIT optimization in jscript9.dll confuses object types while processing attacker-controlled JavaScript, enabling memory corruption and arbitrary code execution. Exploitation requires the content to be rendered; observed Office delivery also required the user to disable Protected View before a remote template loaded.

The record

CVE
CVE-2022-41128
Published
Nov 9, 2022
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 31, 2022Exploitation reportedAPT37 malicious-document campaign
  2. Nov 8, 2022Exploitation reportedCISA Known Exploited Vulnerabilities catalog entry
  3. Nov 9, 2022CVE publishedPublication date reported by the CVE source.
  4. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.10240.0 <10.0.10240.19567

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.19567
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.3650
Microsoft · Windows 7version=6.1.0 <6.1.7601.26221
Microsoft · Windows 10 Version 21H1version=10.0.0 <10.0.19043.2251
Microsoft · Windows 8.1version=6.3.0 <6.3.9600.20671
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.1219
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.23968
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.2251
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.5501
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.26221
Microsoft · Windows 10 Version 20H2version=10.0.0 <10.0.19042.2251
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.2251
Microsoft · Windows 7 Service Pack 1version=6.1.0 <6.1.7601.26221
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.819
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.5501
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.1249
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.3650; version=10.0.17763.0 <10.0.17763.3650
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.20671

Published CVSS scores

8.8INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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