Authenticated remote code execution via lsasrv heap overflow
Published Aug 11, 2026 · Updated Aug 25, 2026
A heap-based buffer overflow in Microsoft Windows lsasrv allows remote authenticated users to execute code over a network. The published record identifies a heap overwrite in lsasrv but does not disclose the input path, affected routine, or faulty bounds operation. Reaching the flaw requires low-privileged network authentication; successful exploitation executes code in the security-sensitive lsasrv context.
Summary
What happened
A heap-based buffer overflow in Microsoft Windows lsasrv allows remote authenticated users to execute code over a network. The published record identifies a heap overwrite in lsasrv but does not disclose the input path, affected routine, or faulty bounds operation. Reaching the flaw requires low-privileged network authentication; successful exploitation executes code in the security-sensitive lsasrv context.
The record
- CVE
- CVE-2026-62784
- Published
- Aug 11, 2026
- Updated
- Aug 25, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-122, CAPEC-92, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 11, 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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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.9121
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
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Your stack
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