Adjacent-network code execution via RRAS use-after-free
Published Sep 8, 2026 · Updated Sep 10, 2026
Remote code execution in Microsoft Windows RRAS allows attackers to execute code via access from an adjacent network. RRAS reuses or references memory after freeing it, but Microsoft has not identified the affected function or triggering protocol message. Exploitation requires no privileges or user interaction, but high-complexity access from an adjacent network is required.
Summary
What happened
Remote code execution in Microsoft Windows RRAS allows attackers to execute code via access from an adjacent network. RRAS reuses or references memory after freeing it, but Microsoft has not identified the affected function or triggering protocol message. Exploitation requires no privileges or user interaction, but high-complexity access from an adjacent network is required.
The record
- CVE
- CVE-2026-70570
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-416, T1210
- Attack vector
- adjacent
- Privileges
- unauthenticated
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=10.0.17763.0 <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.
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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