CVE-2026-83683: Windows Encrypting File System (EFS) Information Disclosure Vulnerability
Absolute path traversal in Windows Encrypting File System (EFS) allows an authorized attacker to disclose information over a network.
Other sources
Windows Encrypting File System (EFS) Information Disclosure Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
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Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
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Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
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Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
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Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Which systems are listed as affected?
Affected software includes Microsoft Windows 10 and Windows 11, plus Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019, Windows Server 2022, and Windows Server 2025.
What level of access does an attacker need?
The attacker must be authorized and have low-level privileges. The vulnerability is reachable over a network and does not require user interaction.
What is the expected security impact?
The reported impact is high confidentiality loss: an attacker may disclose information. No integrity or availability impact is indicated.
Is exploitation expected to be complex?
The vector rates attack complexity as low. The reported scope is unchanged, meaning the impact is assessed within the affected security authority.