CVE-2026-32202: Microsoft Windows Protection Mechanism Failure Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 28 Apr 2026, 14 days after the CVE record was published.

How likely is exploitation in the next 30 days?

70.9%

EPSS score, percentile 99.4 of all scored records

How severe?

4.3 Medium

CVSS v3.1 base score, given by the CNA

What should I do?

CISA deadline 12 May 2026. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Advisories and patches (1)

Which versions are affected?

Affected

• from 10.0.14393.0 to before 10.0.14393.9339
• from 10.0.17763.0 to before 10.0.17763.9020
• from 10.0.19044.0 to before 10.0.19044.7548
• from 10.0.19045.0 to before 10.0.19045.7548
• from 10.0.22631.0 to before 10.0.22631.7376
• from 10.0.22631.0 to before 10.0.22631.7376

and 14 more in the table below

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 12 May 2026.

Advisories and patches

• Windows Shell Spoofing Vulnerability (Vendor advisory, Patch)

Linked from CISA's catalog entry

• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-32202
• https://nvd.nist.gov/vuln/detail/CVE-2026-32202

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Microsoft Windows Shell contains a protection mechanism failure vulnerability that allows an unauthorized attacker to perform spoofing over a network.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2026-32202 to its Known Exploited Vulnerabilities (KEV) catalog on 28 Apr 2026.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 12 May 2026.
• The CVE record was published on 14 Apr 2026, 14 days before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 4.3 (Medium), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 70.9% (percentile 99.4), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact partial.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Windows Shell Spoofing Vulnerability

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

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-693: Protection Mechanism Failure

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

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