CISA KEV · Known exploitedMedium

CVE-2026-32202

Microsoft Windows

Protection mechanism failure in Windows Shell allows an unauthorized attacker to perform spoofing over a network.

CVSS: 4.3
EPSS: 63.7%
CISA KEV: Listed
Published: 2026.04.15

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability63.7%

Technical severityCVSS 4.3

Vulnerability overview

Protection mechanism failure in Windows Shell allows an unauthorized attacker to perform spoofing over a network.

Affected product and versions

Product: Microsoft Windows
Affected versions: 10.0.14393.0, 10.0.17763.0, 10.0.19044.0, 10.0.19045.0, 10.0.22631.0, 10.0.26100.0, 10.0.26200.0, 10.0.28000.0, 6.2.9200.0, 6.3.9600.0, 10.0.20348.0, 10.0.25398.0, < 10.0.14393.9060, < 10.0.17763.8644, < 10.0.19044.7184, < 10.0.19045.7184, < 10.0.22631.6936, < 10.0.26100.8246, < 10.0.26200.8246, < 10.0.28000.1836
Fixed versions: 10.0.14393.9060, 10.0.17763.8644, 10.0.19044.7184, 10.0.19045.7184, 10.0.22631.6936, 10.0.26100.8246, 10.0.26200.8246, 10.0.28000.1836, 10.0.20348.5020, 10.0.25398.2274, 10.0.26100.32690

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Due date: 2026.05.12

1
Identify
Confirm that Microsoft Windows and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE: CWE-693
KEV added: 2026.04.28
Ransomware use: 미확인