Code execution via Internet Explorer type confusion
Published Jan 14, 2025 · Updated Jun 9, 2026
Type confusion in Internet Explorer on Windows Server 23H2 and 2025 allows local users to execute code after required user interaction. Microsoft has not published which Internet Explorer object is accessed under an incompatible type or how attacker-controlled content reaches it. A victim must interact with attacker-controlled content, and successful exploitation runs code in the victim's security context.
Summary
What happened
Type confusion in Internet Explorer on Windows Server 23H2 and 2025 allows local users to execute code after required user interaction. Microsoft has not published which Internet Explorer object is accessed under an incompatible type or how attacker-controlled content reaches it. A victim must interact with attacker-controlled content, and successful exploitation runs code in the victim's security context.
The record
- CVE
- CVE-2025-21326
- Published
- Jan 14, 2025
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-843, T1204
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 14, 2025CVE publishedPublication date reported by the CVE source.
- Jun 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26100.0 <10.0.26100.2894
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo