Authenticated code execution via DNS use-after-free
Published Sep 8, 2026 · Updated Sep 10, 2026
Use-after-free in Microsoft Windows DNS on Windows Server 2025 before 10.0.26100.33438 allows remote authenticated users to execute code. Microsoft has not published the affected function, object lifetime error, or attacker-controlled DNS operation that accesses freed memory. Low-privileged network access and high-complexity conditions are required; successful exploitation executes code without user interaction.
Summary
What happened
Use-after-free in Microsoft Windows DNS on Windows Server 2025 before 10.0.26100.33438 allows remote authenticated users to execute code. Microsoft has not published the affected function, object lifetime error, or attacker-controlled DNS operation that accesses freed memory. Low-privileged network access and high-complexity conditions are required; successful exploitation executes code without user interaction.
The record
- CVE
- CVE-2026-72928
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-416, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 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=10.0.26100.0 <10.0.26100.33438
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.
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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