Threats / Microsoft / CVE-2025-30397
CVE-2025-30397
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Windows vulnerability
Microsoft Windows Scripting Engine type confusion vulnerability allows remote code execution via specially crafted URLs. Actively exploited in the wild.
Verdict
Today item — known-exploited.
Type confusion in the scripting engine permits an attacker to bypass type safety mechanisms and achieve arbitrary code execution on vulnerable Windows systems through network-delivered payloads, with confirmed active exploitation.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
6 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 2025-05-13).
Probability (EPSS)
EPSS 0.21562 — 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-843 Type Confusion — 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
I craft a malicious URL containing specially formatted script content that exploits type confusion in the Windows Scripting Engine.
Business
Users visiting attacker-controlled or compromised websites face immediate risk of system compromise without additional user interaction.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I deliver the URL through email, messaging, or web-based vectors to reach target systems.
Business
Attack surface expands across communication channels, increasing likelihood of successful delivery to target populations.
3
Lateral reach — past segmentation narrative 3
Attacker
I trigger type confusion that causes the scripting engine to misinterpret object types, allowing me to access restricted memory regions or execute arbitrary code.
Business
Attacker gains code execution context with privileges of the affected user or browser process.
4
Data at risk — exfiltration narrative 4
Attacker
I execute arbitrary commands or install malware on the compromised system.
Business
Systems become subject to data theft, lateral movement, persistence mechanisms, or further compromise within the network.
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