Threats / Microsoft / CVE-2022-41128
CVE-2022-41128
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Windows vulnerability
Microsoft Windows JScript9 contains an out-of-bounds write vulnerability enabling remote code execution. The flaw has been exploited in the wild.
Verdict
Today item — known-exploited.
A memory corruption flaw in Windows JScript9 allows attackers to execute arbitrary code remotely, typically through malicious scripts or web content. Active exploitation in the wild indicates immediate risk to unpatched systems.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
14 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-11-08).
Probability (EPSS)
EPSS 0.24808 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Microsoft, Windows. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-787 Out-of-bounds Write — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
Craft malicious JScript9 code embedded in a webpage or document to trigger the out-of-bounds write.
Business
User browsing compromised or attacker-controlled web content becomes infected without additional interaction.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
Achieve code execution in the context of the user's browser or scripting engine process.
Business
Attacker gains foothold on the endpoint with user-level privileges, enabling lateral movement and data theft.
3
Lateral reach — past segmentation narrative 3
Attacker
Escalate privileges or deploy secondary payloads such as malware or backdoors.
Business
Compromise spreads across the network; sensitive data is exfiltrated or systems are rendered unavailable.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05