What is the CVSS score of CVE-2026-20937?

CVE-2026-20937 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Windows are affected by CVE-2026-20937?

CVE-2026-20937 presents moderate security risk, a information exposure vulnerability rated CVSS 5.5. Sensitive information could be exposed to unauthorized parties.. A patch is available.

Windows CVE-2026-20937

MEDIUM

Information Exposure (CWE-200)

2026-01-13 secure@microsoft.com

Windows Windows Server 2022 Windows 10 21h2 Windows 10 22h2 Windows 10 1607 Windows 11 25h2 Windows 11 23h2 Windows Server 2022 23h2 Windows Server 2025 Windows 10 1809 Windows Server 2019 Windows 11 24h2 Windows Server 2016 Microsoft

5.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 13, 2026 - 18:16 nvd

MEDIUM 5.5

DescriptionCVE.org

Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

AnalysisAI

Windows File Explorer improperly restricts access to sensitive information, enabling authenticated local users to read confidential data without authorization. This vulnerability affects Windows 10 across multiple versions (1607, 1809, 21H2, 22H2) and requires valid user credentials and local system access to exploit. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 5.5 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker without authentication could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-20937 vulnerability details – vuln.today

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Windows CVE-2026-20937

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Recommended ActionAI

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