What is the CVSS score of CVE-2026-21222?

CVE-2026-21222 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-2026-21222?

Organizations using Insertion of sensitive information into log file in Windows Kernel should be aware of moderate risk from CVE-2026-21222, a log file exposure vulnerability rated CVSS 5.5.. A patch is available.

Windows CVE-2026-21222

MEDIUM

Insertion of Sensitive Information into Log File (CWE-532)

2026-02-10 secure@microsoft.com

Linux Windows Windows 10 22h2 Windows 11 24h2 Windows 11 23h2 Windows 10 1607 Windows Server 2022 23h2 Windows Server 2022 Windows Server 2016 Windows 10 1809 Windows Server 2025 Windows Server 2019 Windows Server 2012 Windows 10 21h2 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 - 22:02 vuln.today

CVE Published

Feb 10, 2026 - 18:16 nvd

MEDIUM 5.5

DescriptionCVE.org

Insertion of sensitive information into log file in Windows Kernel allows an authorized attacker to disclose information locally.

AnalysisAI

Windows Kernel inadvertently logs sensitive information accessible to authenticated local users, enabling information disclosure attacks. This medium-severity vulnerability affects Windows 10 22H2, Windows 11 23H2, and 24H2, as well as Linux systems, allowing authorized attackers with local access to retrieve confidential data. …

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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 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-2026-21222 vulnerability details – vuln.today

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Windows CVE-2026-21222

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Recommended ActionAI

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