CVE-2026-70055

Analyzed Analyzed - Analysis Complete

Exposure of Sensitive Information in Windows Cryptographic Services

Publication date: 2026-10-13

Last updated on: 2026-10-28

Assigner: Microsoft Corporation

Description

Exposure of sensitive system information to an unauthorized control sphere in Windows Cryptographic Services allows an authorized attacker to disclose information locally.

CVSS Scores

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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-2026-70055

EUVD

EUVD-2026-99860

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
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_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (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

KEV

CWE ID	Description
CWE-497	The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does.

Attack-Flow Graph

Executive Summary

This vulnerability involves the exposure of sensitive system information to an unauthorized control sphere in Windows Cryptographic Services. An authorized attacker can locally disclose this information, potentially leading to data leaks.

Detection Guidance

This vulnerability involves information disclosure in Windows Cryptographic Services. Detection typically requires monitoring for unusual access to cryptographic service logs or registry keys. Check Windows Event Viewer for events related to cryptographic operations under Applications and Services Logs > Microsoft > Windows > CAPI2. Review registry keys under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Cryptography for unauthorized modifications.

Impact Analysis

An attacker could exploit this to access sensitive system information locally, which may include configuration details or internal data. This could lead to further attacks or unauthorized access if combined with other vulnerabilities.

Compliance Impact

This vulnerability allows unauthorized local disclosure of sensitive system information, which could lead to exposure of personal or confidential data. This may violate GDPR's data protection principles if personal data is involved, and HIPAA's security requirements if protected health information is compromised.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Cryptographic Services vulnerability. Monitor Microsoft's update guide for the specific patch release.

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