CASCACascade Atlas

Evidence dossier

CVE-2017-0037

Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in…

Exploited in the wild (CISA KEV since Mar 28, 2022). NVD reports CVSS 3.1 8.1. EPSS estimates 80.4% exploit likelihood as of Oct 21, 2026.

81.7–83.0Priority evidence range
Evidence through Oct 22, 2026, 6:07 PM UTC

As of Oct 22, 2026

Normalized restatement

Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence and crafted JavaScript code that operates on a TH element.

State
PUBLISHED
Published
Feb 26, 2017
Updated
Oct 21, 2025
Evidence coverage
95%

Evidence chronology

What was known when

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  1. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    CVE Program

    Record text: CVE Program Container

    Inspect raw assertion
    Field
    container
    Value
    CVE Program Container
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    microsoft

    Record text: Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence and crafted JavaScript code that operates on a TH element.

    Inspect raw assertion
    Field
    container
    Value
    Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence and crafted JavaScript code that operates on a TH element.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Microsoft Edge and Internet Explorer Type Confusion Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Microsoft Edge and Internet Explorer Type Confusion Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 80.39% probability · 99.62th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.803860000000; percentile 0.996230000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Mar 28, 2022 · first observed Sep 1, 2026

Exploit likelihood80.39%

FIRST EPSS · score date Oct 21, 2026 · 99.6th percentile · first observed Oct 21, 2026

SeverityCVSS 8.1

NVD · CVSS 3.1 · first observed Jul 19, 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-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CVE ProgramDerivative copy
Record text

CVE Program Container

Inspect raw assertion
Field
container
Value
CVE Program Container
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
microsoftOriginal assertion
Record text

Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence and crafted JavaScript code that operates on a TH element.

Inspect raw assertion
Field
container
Value
Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence and crafted JavaScript code that operates on a TH element.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Microsoft Edge and Internet Explorer Type Confusion Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Microsoft Edge and Internet Explorer Type Confusion Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

80.39% probability · 99.62th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.803860000000; percentile 0.996230000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
13Underlying assertions
9Canonical products
2Target assertions
11Constraint assertions

Grouped from 4 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

10 scope groups

microsoft · source assertedMicrosoft CorporationInternet BrowserDirect source scope
Affected: Internet Explorer 10 and 11 and Edge
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "Internet Explorer 10 and 11 and Edge"}]
NVD CPE · APPLICATIONmicrosoftedgeVulnerable target · 1 assertions
Any version (unconstrained)Canonical identity product-392790dbff8af15e1e2ba8b85e7e6ce068ad4439e95ad4241880503780c43a59Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:microsoft:edge:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    8bd5b232-95ea-4f8e-8c7d-7976877ad243
NVD CPE · APPLICATIONmicrosoftinternet_explorerVulnerable target · 1 assertions
Version 11Canonical identity product-d26e3505f2452daa926474c7ca23fc78f73a7b20902783174428ff8d6e276baaLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    d7809f78-8d56-4925-a8f9-4119b973a667
NVD CPE · OPERATING SYSTEMmicrosoftwindows_10_1507Environmental constraint · 2 assertions
Version not applicableCanonical identity product-9851bd571b8ab08bca589cd73710badfef557d036f0fb7707f694f1c9f597cb4Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    542daeec-73cc-46c6-a630-bf474a3446ac
  2. cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    542daeec-73cc-46c6-a630-bf474a3446ac
NVD CPE · OPERATING SYSTEMmicrosoftwindows_10_1511Environmental constraint · 2 assertions
Version not applicableCanonical identity product-7b807aecec9e7ce1999b1cdf357022e504d2f3daa554142c46b57e2c37e3597aLinked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:o:microsoft:windows_10_1511:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    7a8e9d99-bd78-4340-88f2-5aff27ac37c9
  2. cpe:2.3:o:microsoft:windows_10_1511:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    7a8e9d99-bd78-4340-88f2-5aff27ac37c9
NVD CPE · OPERATING SYSTEMmicrosoftwindows_10_1607Environmental constraint · 2 assertions
Version not applicableCanonical identity product-740fec3e9838b5eabe76ebe27e4d0d7a4cb2e0ef7e13923300d3d0b51e3fce1cLinked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    61019899-d7af-46e4-a72c-d189180f66ab
  2. cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    61019899-d7af-46e4-a72c-d189180f66ab
NVD CPE · OPERATING SYSTEMmicrosoftwindows_8.1Environmental constraint · 1 assertions
Version not applicableCanonical identity product-7e46de82012029583622f69d79b86bc210b5bd25b8cb3bb4468936702b23c4b0Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    e93068db-549b-45ab-8e5c-00eb5d8b5cf8
NVD CPE · OPERATING SYSTEMmicrosoftwindows_rt_8.1Environmental constraint · 1 assertions
Version not applicableCanonical identity product-076c7e47c78d9425d54dea0b063ed7cd79e5f9f0bfdb3c9153b8aec4e71a7ad9Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 4
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c6ce5198-c498-4672-af4c-77ab4be06c5c
NVD CPE · OPERATING SYSTEMmicrosoftwindows_server_2012Environmental constraint · 2 assertions
Version not applicable; Version r2Canonical identity product-5a80416e92fed0cddbb3d4f3840218b448dee11159824ad25a0353da566963feLinked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 6
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    db18c4ce-5917-401e-acf7-2747084fd36e
  2. cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 5
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    a7df96f8-ba6a-4780-9ca3-f719b3f81074
NVD CPE · OPERATING SYSTEMmicrosoftwindows_server_2016Environmental constraint · 1 assertions
Version not applicableCanonical identity product-02e254d111ce604757a15650ef469f4f8365d6247da82ce3ac2695c3cfc7dc5fLinked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 7
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    041ff8ba-0b12-4a1f-b4bf-9c4f33b7c1e7

Affected-product evidence

Accepted scope and product mapping

2 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-01299a5a765aea70faa05f2d06e0c26a5d498fd34553e868d89e8a43b31864db · product-392790dbff8af15e1e2ba8b85e7e6ce068ad4439e95ad4241880503780c43a59

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Oct 22, 2026
Retained assertion IDs
95541fae-37a2-4e41-b86b-50f9087205fa
Mapping establishedEvidence supported

vendor-01299a5a765aea70faa05f2d06e0c26a5d498fd34553e868d89e8a43b31864db · product-d26e3505f2452daa926474c7ca23fc78f73a7b20902783174428ff8d6e276baa

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Oct 22, 2026
Retained assertion IDs
a09e8d99-996b-4d07-bd23-a67b2e720778
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
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Oct 22, 2026
Retained assertion IDs
6481fb07-1ce3-42fa-9d85-1982bc9c07d5

Assessments

CVSS by origin

8.1
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.6
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:H/Au:N/C:C/I:C/A:C
8.1
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1
CISA-ADPCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

8.1Priority eligible

CISA-ADP

CVSS 3.1 · Secondary · Independent enrichment · rank 2

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
8.1
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.