CVE-2026-70163
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Resource Exhaustion in OpenSSH for Windows

Publication date: 2026-10-13

Last updated on: 2026-10-28

Assigner: Microsoft Corporation

Description
Allocation of resources without limits or throttling in OpenSSH for Windows allows an unauthorized attacker to deny service over a network.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-28
Generated
2026-11-08
AI Q&A
2026-10-14
EPSS Evaluated
2026-11-07
NVD
CVE-2026-70163
EUVD
EUVD-2026-99414

Affected Vendors & Products

Showing 21 associated CPEs
Vendor Product Version / Range
microsoft windows_10_1809 to 10.0.17763.9376 (exc)
microsoft windows_10_1809 to 10.0.17763.9376 (exc)
microsoft windows_10_21h2 to 10.0.19044.7807 (exc)
microsoft windows_10_21h2 to 10.0.19044.7807 (exc)
microsoft windows_10_21h2 to 10.0.19044.7807 (exc)
microsoft windows_11_23h2 to 10.0.22631.7652 (exc)
microsoft windows_11_23h2 to 10.0.22631.7652 (exc)
microsoft windows_11_24h2 to 10.0.26100.9711 (exc)
microsoft windows_11_24h2 to 10.0.26100.9711 (exc)
microsoft windows_11_25h2 to 10.0.26200.9711 (exc)
microsoft windows_11_25h2 to 10.0.26200.9711 (exc)
microsoft windows_11_26h1 to 10.0.28000.3231 (exc)
microsoft windows_11_26h1 to 10.0.28000.3231 (exc)
microsoft windows_11_26h2 to 10.0.26300.9711 (exc)
microsoft windows_11_26h2 to 10.0.26300.9711 (exc)
microsoft windows_server_2025 to 10.0.26100.33650 (exc)
microsoft windows_server_2022 to 10.0.20348.5761 (exc)
microsoft windows_server_2019 to 10.0.17763.9376 (exc)
microsoft windows_10_22h2 to 10.0.19045.7807 (exc)
microsoft windows_10_22h2 to 10.0.19045.7807 (exc)
microsoft windows_10_22h2 to 10.0.19045.7807 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-770 The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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Executive Summary

This vulnerability involves OpenSSH for Windows failing to properly limit resource allocation. An unauthorized attacker can exploit this to send excessive requests, consuming system resources and causing a denial of service over the network.

Impact Analysis

The impact includes system slowdowns, crashes, or unavailability of services relying on OpenSSH for Windows. Users may experience disrupted network connectivity or application failures if the system is overwhelmed.

Compliance Impact

This vulnerability allows denial of service attacks, which could disrupt critical services. For GDPR, this may impact availability of personal data processing systems, potentially violating Article 32 requirements for resilience. For HIPAA, service disruptions could affect access to protected health information, potentially compromising the integrity and availability requirements of the Security Rule.

Mitigation Strategies

Apply the latest security updates for OpenSSH on Windows systems. Monitor network traffic for unusual patterns that may indicate denial of service attempts. Restrict access to OpenSSH ports if possible.

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