Code execution via heap-based buffer overflow
Published Aug 14, 2026 · Updated Aug 25, 2026
Heap-based buffer overflow in Microsoft Edge (Chromium-based) before 151.0.4129.86 allows remote attackers to execute code via crafted web content. Microsoft has described the flaw only as a heap-based buffer overflow and has not published the affected Edge component or the out-of-bounds heap operation it performs on untrusted input. The published CVSS assessment requires user interaction, so exposure depends on rendering attacker-controlled content, with code execution bounded to the browser security context.
Summary
What happened
Heap-based buffer overflow in Microsoft Edge (Chromium-based) before 151.0.4129.86 allows remote attackers to execute code via crafted web content. Microsoft has described the flaw only as a heap-based buffer overflow and has not published the affected Edge component or the out-of-bounds heap operation it performs on untrusted input. The published CVSS assessment requires user interaction, so exposure depends on rendering attacker-controlled content, with code execution bounded to the browser security context.
The record
- CVE
- CVE-2026-72970
- Published
- Aug 14, 2026
- Updated
- Aug 25, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-122, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 14, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
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Technologies
Your stack
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Your stack
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