Authenticated code execution via integer wraparound
Published Mar 10, 2026 · Updated Mar 10, 2026
Integer wraparound in Windows RRAS on affected Windows Server releases allows remote authenticated users to execute code over a network. Microsoft maps the flaw to integer overflow and a resulting heap-based buffer overflow but has not disclosed the affected parser or arithmetic operation. Exploitation requires low privileges and user interaction; successful exploitation executes attacker-controlled code in the RRAS context.
Summary
What happened
Integer wraparound in Windows RRAS on affected Windows Server releases allows remote authenticated users to execute code over a network. Microsoft maps the flaw to integer overflow and a resulting heap-based buffer overflow but has not disclosed the affected parser or arithmetic operation. Exploitation requires low privileges and user interaction; successful exploitation executes attacker-controlled code in the RRAS context.
The record
- CVE
- CVE-2026-26111
- Published
- Mar 10, 2026
- Updated
- Mar 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-122, CWE-190, T1203
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 10, 2026CVE publishedPublication date reported by the CVE source.
- Mar 10, 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 <10.0.17763.8511
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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