Authenticated code execution via integer underflow
Published Sep 8, 2026 · Updated Sep 9, 2026
Integer underflow in Microsoft Windows Remote Access Connection Manager allows remote authenticated users to execute code over a network. The manager performs integer arithmetic that wraps below the supported minimum while processing attacker-controlled input; Microsoft has not disclosed a narrower function or message field. Successful exploitation requires authenticated network access and yields code execution in the service's security context.
Summary
What happened
Integer underflow in Microsoft Windows Remote Access Connection Manager allows remote authenticated users to execute code over a network. The manager performs integer arithmetic that wraps below the supported minimum while processing attacker-controlled input; Microsoft has not disclosed a narrower function or message field. Successful exploitation requires authenticated network access and yields code execution in the service's security context.
The record
- CVE
- CVE-2026-71352
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-191, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 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 <10.0.17763.9245
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.
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Technologies
Your stack
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Your stack
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