Privilege escalation via undisclosed heap buffer overflow
Published Jan 11, 2024 · Updated Jun 3, 2025
Heap-based buffer overflow in Microsoft Edge before 120.0.2210.133 and Extended Stable before 120.0.2210.160 allows attackers to elevate privileges. Microsoft discloses only the heap-based buffer-overflow class; no public advisory identifies the affected component or faulty memory operation. Exploitation requires local access and user interaction; Microsoft reports that no prior privileges are required.
Summary
What happened
Heap-based buffer overflow in Microsoft Edge before 120.0.2210.133 and Extended Stable before 120.0.2210.160 allows attackers to elevate privileges. Microsoft discloses only the heap-based buffer-overflow class; no public advisory identifies the affected component or faulty memory operation. Exploitation requires local access and user interaction; Microsoft reports that no prior privileges are required.
The record
- CVE
- CVE-2024-21337
- Published
- Jan 11, 2024
- Updated
- Jun 3, 2025
- Vendor
- Microsoft
- Product
- Microsoft Edge (Chromium-based)
- Classifications
- CWE-122, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 11, 2024CVE publishedPublication date reported by the CVE source.
- Jun 3, 2025Record 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.
- Affected versionversion=1.0.0 <120.0.2210.133
- Affected versionversion=1.0.0 <120.0.2210.160
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.
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
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Your stack
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