Evidence dossier

CVE-2026-32202

Windows Shell Spoofing Vulnerability

Exploited in the wild (CISA KEV since Apr 28, 2026). microsoft reports CVSS 3.1 4.3. EPSS estimates 4.9% exploit likelihood as of Oct 22, 2026.

55.2–68.5Priority evidence range

Evidence through Oct 22, 2026, 6:07 PM UTC

As of Oct 22, 2026

Normalized restatement

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

State: PUBLISHED
Published: Apr 14, 2026
Updated: Oct 15, 2026
Evidence coverage: 85%

Evidence chronology

What was known when

Download this view's receipt →

Source dateSep 1, 2026First observed by CASCASep 1, 2026
CISA KEV
Exploitation cataloged: Microsoft Windows Protection Mechanism Failure Vulnerability
Inspect raw assertion
Field
observed_exploitation
Value
Microsoft Windows Protection Mechanism Failure Vulnerability
Original evidence ↗
Source dateSource date omittedFirst observed by CASCAOct 16, 2026
CISA-ADP
Record text: CISA ADP Vulnrichment
Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Original evidence ↗
Source dateSource date omittedFirst observed by CASCAOct 16, 2026
CVE Program
Record text: CVE Program Container
Inspect raw assertion
Field
container
Value
CVE Program Container
Original evidence ↗
Source dateSource date omittedFirst observed by CASCAOct 16, 2026
microsoft
Record text: Windows Shell Spoofing Vulnerability
Inspect raw assertion
Field
container
Value
Windows Shell Spoofing Vulnerability
Original evidence ↗
Source dateOct 22, 2026First observed by CASCAOct 22, 2026
FIRST EPSS
EPSS score: 4.9% probability · 92.06th percentile
Inspect raw assertion
Field
model_probability
Value
Probability 0.049020000000; percentile 0.920620000000
Original evidence ↗

ExploitationCatalog member

CISA KEV · catalog date Apr 28, 2026 · first observed Sep 1, 2026

Exploit likelihood4.90%

FIRST EPSS · score date Oct 22, 2026 · 92.1th percentile · first observed Oct 22, 2026

SeverityCVSS 4.3

microsoft · CVSS 3.1 · first observed Oct 16, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

casca-unknown-reasons-v1

Exploitation statusLast verified source snapshot retained

The last verified source boundary remains in force for this claim.

Revision: evidence-policy-v1.1.0
Cutoff: Oct 22, 2026
Resolution: Review source contract

Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision: evidence-policy-v1.1.0
Cutoff: Oct 22, 2026
Resolution: None

Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision: casca-direct-cvss-eligibility-v1
Cutoff: Oct 22, 2026
Resolution: None

Affected productsSource-reported scope

The cited source assertion is retained while canonical product linkage remains open.

Revision: casca-factor-d-obligations-v1
Cutoff: Oct 22, 2026
Resolution: Resolve identity

Source comparison

Who said what

CISA KEVOriginal assertion

Exploitation cataloged

Microsoft Windows Protection Mechanism Failure Vulnerability

Inspect raw assertion

Field: observed_exploitation
Value: Microsoft Windows Protection Mechanism Failure Vulnerability

Source dateSep 1, 2026First observed by CASCASep 1, 2026Original evidence ↗

CISA-ADPIndependent enrichment

Record text

CISA ADP Vulnrichment

Inspect raw assertion

Field: container
Value: CISA ADP Vulnrichment

Source dateSource date omittedFirst observed by CASCAOct 16, 2026Original evidence ↗

CVE ProgramDerivative copy

Record text

CVE Program Container

Inspect raw assertion

Field: container
Value: CVE Program Container

Source dateSource date omittedFirst observed by CASCAOct 16, 2026Original evidence ↗

microsoftOriginal assertion

Record text

Windows Shell Spoofing Vulnerability

Inspect raw assertion

Field: container
Value: Windows Shell Spoofing Vulnerability

Source dateSource date omittedFirst observed by CASCAOct 16, 2026Original evidence ↗

FIRST EPSSOriginal assertion

EPSS score

4.9% probability · 92.06th percentile

Inspect raw assertion

Field: model_probability
Value: Probability 0.049020000000; percentile 0.920620000000

Source dateOct 22, 2026First observed by CASCAOct 22, 2026Original evidence ↗

Applicability

Cited product scope

Trace impact →

25Underlying assertions

14Canonical products

25Target assertions

0Constraint assertions

Grouped from 1 configuration nodes in this exact snapshot. Visual grouping is navigational; asset exposure and root cause require cited evidence.

Identity source boundaries

Cpe dictionary1,775,266 records · observed through 2026-07-21T06:45:29.809Z27d65b0f-b718-4b4f-bb79-c47c68d09dfa
Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z955dae73-7302-438b-aee1-058d7cc5d48e

Search scopeRoleOfficial link state

34 scope groups

microsoft · source assertedMicrosoftWindows 10 Version 1607Direct source scope

Affected: 10.0.14393.0 to before 10.0.14393.9339 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.14393.0", "lessThan": "10.0.14393.9339", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows 10 Version 1809Direct source scope

Affected: 10.0.17763.0 to before 10.0.17763.9020 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.17763.0", "lessThan": "10.0.17763.9020", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows 10 Version 21H2Direct source scope

Affected: 10.0.19044.0 to before 10.0.19044.7548 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.19044.0", "lessThan": "10.0.19044.7548", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows 10 Version 22H2Direct source scope

Affected: 10.0.19045.0 to before 10.0.19045.7548 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.19045.0", "lessThan": "10.0.19045.7548", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows 11 version 23H2Direct source scope

Affected: 10.0.22631.0 to before 10.0.22631.7376 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.22631.0", "lessThan": "10.0.22631.7376", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows 11 Version 23H2Direct source scope

Affected: 10.0.22631.0 to before 10.0.22631.7376 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.22631.0", "lessThan": "10.0.22631.7376", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows 11 Version 24H2Direct source scope

Affected: 10.0.26100.0 to before 10.0.26100.8875 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.26100.0", "lessThan": "10.0.26100.8875", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows 11 Version 25H2Direct source scope

Affected: 10.0.26200.0 to before 10.0.26200.8875 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.26200.0", "lessThan": "10.0.26200.8875", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows 11 version 26H1Direct source scope

Affected: 10.0.28000.0 to before 10.0.28000.2525 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.28000.0", "lessThan": "10.0.28000.2525", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2012Direct source scope

Affected: 6.2.9200.0 to before 6.2.9200.26226 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "6.2.9200.0", "lessThan": "6.2.9200.26226", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2012 R2Direct source scope

Affected: 6.3.9600.0 to before 6.3.9600.23291 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "6.3.9600.0", "lessThan": "6.3.9600.23291", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2012 R2 (Server Core installation)Direct source scope

Affected: 6.3.9600.0 to before 6.3.9600.23291 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "6.3.9600.0", "lessThan": "6.3.9600.23291", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2012 (Server Core installation)Direct source scope

Affected: 6.2.9200.0 to before 6.2.9200.26226 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "6.2.9200.0", "lessThan": "6.2.9200.26226", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2016Direct source scope

Affected: 10.0.14393.0 to before 10.0.14393.9339 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.14393.0", "lessThan": "10.0.14393.9339", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2016 (Server Core installation)Direct source scope

Affected: 10.0.14393.0 to before 10.0.14393.9339 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.14393.0", "lessThan": "10.0.14393.9339", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2019Direct source scope

Affected: 10.0.17763.0 to before 10.0.17763.9020 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.17763.0", "lessThan": "10.0.17763.9020", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2019 (Server Core installation)Direct source scope

Affected: 10.0.17763.0 to before 10.0.17763.9020 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.17763.0", "lessThan": "10.0.17763.9020", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2022Direct source scope

Affected: 10.0.20348.0 to before 10.0.20348.5386 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.20348.0", "lessThan": "10.0.20348.5386", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2025Direct source scope

Affected: 10.0.26100.0 to before 10.0.26100.33158 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.26100.0", "lessThan": "10.0.26100.33158", "versionType": "custom"}]

microsoft · source assertedMicrosoftWindows Server 2025 (Server Core installation)Direct source scope

Affected: 10.0.26100.0 to before 10.0.26100.33158 (custom comparison)

Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion

[{"status": "affected", "version": "10.0.26100.0", "lessThan": "10.0.26100.33158", "versionType": "custom"}]

NVD CPE · OPERATING SYSTEMmicrosoftwindows_10_1607Vulnerable target · 2 assertions

Any version (unconstrained) (< 10.0.14393.9060)Canonical identity product-740fec3e9838b5eabe76ebe27e4d0d7a4cb2e0ef7e13923300d3d0b51e3fce1cLinked exact

Scope supported

Inspect raw assertions

cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 1
Logic
OR
Version bounds
through excluding 10.0.14393.9060
Match ID
58e1a340-d49a-4ebb-a750-876922acd5ca
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 0
Logic
OR
Version bounds
through excluding 10.0.14393.9060
Match ID
158c16a3-547e-4130-8428-8e429c37e573

NVD CPE · OPERATING SYSTEMmicrosoftwindows_10_1809Vulnerable target · 2 assertions

Any version (unconstrained) (< 10.0.17763.8644)Canonical identity product-a3084138383423221f61594e86f5b295e5e254acd7ae5284f45e0877a084db43Linked exact

Scope supported

Inspect raw assertions

cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 3
Logic
OR
Version bounds
through excluding 10.0.17763.8644
Match ID
9b1465b1-bde6-4634-8f12-43f71d68a4d6
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 2
Logic
OR
Version bounds
through excluding 10.0.17763.8644
Match ID
64248504-2307-45fc-8ff3-7a227cfd8675

NVD CPE · OPERATING SYSTEMmicrosoftwindows_10_21h2Vulnerable target · 3 assertions

Any version (unconstrained) (< 10.0.19044.7184)Canonical identity product-ec10c9f400f23fdf118887f60fe116ffde4adb76dcf118cdd3a7556fd033da3bLinked exact

Scope supported

Inspect raw assertions

cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 4
Logic
OR
Version bounds
through excluding 10.0.19044.7184
Match ID
88a175c4-e033-4fe7-b2bf-8bae14321bc4
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 6
Logic
OR
Version bounds
through excluding 10.0.19044.7184
Match ID
c375372b-d3d4-4b11-aad8-69ac344c24bc
cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 5
Logic
OR
Version bounds
through excluding 10.0.19044.7184
Match ID
86dbf14a-f486-4fe7-9126-d1d54952fc6c

NVD CPE · OPERATING SYSTEMmicrosoftwindows_10_22h2Vulnerable target · 3 assertions

Any version (unconstrained) (< 10.0.19045.7184)Canonical identity product-a6295b9daad3ca57ce70751badba5b7fe99229c8a562cc7400e8cfef3daccaeeLinked exact

Scope supported

Inspect raw assertions

cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 7
Logic
OR
Version bounds
through excluding 10.0.19045.7184
Match ID
8ce2e268-e776-4697-9e43-33aba4cdbe05
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 9
Logic
OR
Version bounds
through excluding 10.0.19045.7184
Match ID
fcbb431b-ef21-4454-bda3-d8f276be7a64
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 8
Logic
OR
Version bounds
through excluding 10.0.19045.7184
Match ID
269b8e88-6473-41dd-ba33-d9184b82ca58

NVD CPE · OPERATING SYSTEMmicrosoftwindows_11_23h2Vulnerable target · 2 assertions

Any version (unconstrained) (< 10.0.22631.6936)Canonical identity product-026201767813843a6d53867bacde4a55c3035cb868c0a72434012c5e30dab148Linked exact

Scope supported

Inspect raw assertions

cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 10
Logic
OR
Version bounds
through excluding 10.0.22631.6936
Match ID
b33ce091-b873-4c30-ba05-54a8c1839212
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
Official link
Linked exact
Role
Vulnerable target
Configuration
0 · node/0 · match 11
Logic
OR
Version bounds
through excluding 10.0.22631.6936
Match ID
e3af28f3-d486-4b88-9e0e-371241024174

Affected-product evidence

Accepted scope and product mapping

0 canonical links · 2 source-reported links

Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class: Direct cve affected
Assertions: 20
Mapping revision: cpe23-exact-mapping-v1
Observed cutoff: Oct 22, 2026

Retained assertion IDs

1c38e3cd-385b-47f7-a2cb-be4796e857d82019af04-b150-44d6-be9b-e3a39a81bc77269ed529-0a79-42bb-ba0e-c3b481651aab3573c6b2-90d7-4f49-9957-116bf0a610fa387c593b-9935-49d9-9d00-763a9b2c12da3e2c8dc2-568b-4a3b-8600-5d445660a48b3f05b6b1-d8dc-4329-8024-b132362d71c342e3e887-787f-40eb-81d0-b805acd8623c49f998a2-9f21-473c-8589-c373c2afacd64eadbedd-df9a-48f4-af21-d1ef8ed284735de7d14e-8094-4bb9-9cea-5cdfb22a0ab662bd92e3-517d-4ab7-b789-08f059844940672ac246-89c3-44b0-a779-dbb7ed9337bf756d0c0d-ceb0-467e-a10c-e54a5e1159fa98d8fbb0-608a-4b35-9e6f-a07bce7fcaead19074fd-dee0-4b0f-a0f5-88aa7042af82f40c68be-312e-4a8f-b864-1ee1cfbed2d0f8fb9ae4-abec-469c-a4f0-588ff6597ecefb84678f-98c8-4603-bd46-4b9cffd701f2fcb012b9-a9bf-4d44-9fff-96106bb37653

Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class: Nvd cpe vulnerable target
Assertions: 25
Mapping revision: cpe23-exact-mapping-v1
Observed cutoff: Oct 22, 2026

Retained assertion IDs

011f6646-3dbf-4041-8ed9-409912131e4e02a1d98a-8d11-4b46-b7a6-ef23858a6a460fa1569b-eac2-4a2d-8f7e-4e29a9220203148f5d28-8f15-4bca-9333-c12058ffdf6c264365cb-05f8-4427-a41d-f7dc16b8736430532ac2-9a94-43d0-bb93-34b52f9bd34044c57f39-a526-4a90-b1ba-63760f8e4994474f6b42-4233-4698-b0a2-7451ce6fa83947dd68c4-7d08-4390-81e6-56d7a841f2714879d962-e3da-48ee-a72e-1078855bf67348bd09b8-6ca2-4d4d-afe9-c9a957a8e42352af25b9-9a0f-4abe-8c19-eb5d00b76f335b2a4875-8747-4b62-93ef-1aca22572449676139f5-924d-46a2-b81d-74de258a3cb971c8f6b4-1c0d-4c8a-845e-3c6ba51463b374d32931-ffad-4b0b-9b93-cbcafc1bbdf87ad3963a-5430-4377-9dab-2ea68f24fd13861f4095-b7ce-487b-a036-8d23a994772c96fe3058-2a4d-4abf-b8cf-db4465fbca61a70b27c9-09e9-49ec-aea0-44333ae94dfeaafceb60-8cff-4861-bb9d-b086ab5011edca19fc00-e6ab-439b-acc8-e7d735ea4c44cc4c9cbd-3c80-4c83-acde-c95819567922f7eadae9-999c-4e27-8dc0-9358de31b0e8fdb90b28-f8b4-46e0-a71a-93c19d01e69a

Assessments

CVSS by origin

4.3

secure@microsoft.comCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

4.3

microsoftCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:F/RL:O/RC:C

Direct CVE/CNA normalized decisions

4.3Priority eligible

microsoft

CVSS 3.1 · Primary · Original assertion · rank 1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:F/RL:O/RC:C

Validation: Valid match
Recomputed: 4.3
Decision reason: Evidence supported
Policy: casca-direct-cvss-eligibility-v1

Assessments are retained side by side under closed precedence. Cascade never averages CVSS.

Evidence boundaries

KEV membership is authoritative for the catalog, not proof of exposure in any environment.
EPSS is a dated model probability and not an individual-environment prediction.
Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
OSV aggregation and OSV-converted NVD material are not independent corroboration.
Red Hat facts are vendor assertions for the exact supplied products.
Nonmembership and not-yet-observed states are not proof of safety.