Unauthenticated code execution via integer wraparound
Published Sep 8, 2026 · Updated Sep 9, 2026
Integer overflow in Microsoft Windows PDF on affected Windows releases allows remote attackers to execute code over a network. Microsoft identifies an integer wraparound and a resulting heap-based buffer overflow, but has not disclosed the parser routine or malformed PDF field that triggers the arithmetic error. No privileges or user interaction are required; successful exploitation runs attacker-controlled code in the vulnerable component's security context.
Summary
What happened
Integer overflow in Microsoft Windows PDF on affected Windows releases allows remote attackers to execute code over a network. Microsoft identifies an integer wraparound and a resulting heap-based buffer overflow, but has not disclosed the parser routine or malformed PDF field that triggers the arithmetic error. No privileges or user interaction are required; successful exploitation runs attacker-controlled code in the vulnerable component's security context.
The record
- CVE
- CVE-2026-69586
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-122, CWE-190
- Attack vector
- network
- Privileges
- unauthenticated
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?
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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