CASCACascade Atlas

Evidence dossier

CVE-2010-3962

Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS)…

Exploited in the wild (CISA KEV since Oct 6, 2025). NVD reports CVSS 2.0 9.3. EPSS estimates 96.0% exploit likelihood as of Jul 26, 2026.

85.5–87.0Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010.

State
PUBLISHED
Published
Nov 5, 2010
Updated
Oct 22, 2025
Evidence coverage
96%

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: Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010.

    Inspect raw assertion
    Field
    container
    Value
    Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 96.05% probability · 99.87th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.960470000000; percentile 0.998700000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Oct 6, 2025 · first observed Jul 19, 2026

Exploit likelihood96.05%

FIRST EPSS · score date Jul 26, 2026 · 99.9th percentile · first observed Jul 27, 2026

SeverityCVSS 9.3

NVD · CVSS 2.0 · 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 statusEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Aug 27, 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
Aug 27, 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

Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010.

Inspect raw assertion
Field
container
Value
Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading Style Sheets (CSS) token sequences and the clip attribute, aka an "invalid flag reference" issue or "Uninitialized Memory Corruption Vulnerability," as exploited in the wild in November 2010.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

96.05% probability · 99.87th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.960470000000; percentile 0.998700000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
22Underlying assertions
6Canonical products
3Target assertions
19Constraint assertions

Grouped from 6 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

7 scope groups

microsoft · source assertedn/an/aDirect source scope
Affected: n/a
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "n/a"}]
NVD CPE · APPLICATIONmicrosoftinternet_explorerVulnerable target · 3 assertions
Version 6; Version 7; Version 8Canonical identity product-d26e3505f2452daa926474c7ca23fc78f73a7b20902783174428ff8d6e276baaLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    693d3c1c-e3e4-49db-9a13-44addff82507
  2. cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    1a33fa7f-bb2a-4c66-b608-72997a2bd1db
  3. cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    2 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    a52e757f-9b41-43b4-9d67-3fedaca71283
NVD CPE · OPERATING SYSTEMmicrosoftwindows_7Environmental constraint · 1 assertions
Version not applicableCanonical identity product-f20a05098a41a238f96b56b817d0482887bb39ad40620198bbe05da10ee02ffcLinked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    e33796db-4523-4f04-b564-adf030553d51
NVD CPE · OPERATING SYSTEMmicrosoftwindows_server_2003Environmental constraint · 3 assertions
Version not applicableCanonical identity product-21c8a455c6651c09ac3fd0874c5219dd6081913f4835e8de22662b3821fec60bLinked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    1d929aa2-ee0b-4aa1-805d-69bcca11b77f
  2. cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    1d929aa2-ee0b-4aa1-805d-69bcca11b77f
  3. cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    1d929aa2-ee0b-4aa1-805d-69bcca11b77f
NVD CPE · OPERATING SYSTEMmicrosoftwindows_server_2008Environmental constraint · 5 assertions
Version not applicable; Version r2Canonical identity product-217b1ab3d25f361a639824f86753d418b35aa2a816ee370bb71b5d1dd883d87aLinked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    5f422a8c-2c4e-42c8-b420-e0728037e15c
  2. cpe:2.3:o:microsoft:windows_server_2008:-:-:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c2ee0ad3-2adc-480e-b03e-06962ec4f095
  3. cpe:2.3:o:microsoft:windows_server_2008:r2:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 4
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    36559bc0-44d7-48b3-86ff-1bff0257b5ed
  4. cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    5f422a8c-2c4e-42c8-b420-e0728037e15c
  5. cpe:2.3:o:microsoft:windows_server_2008:-:-:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c2ee0ad3-2adc-480e-b03e-06962ec4f095
NVD CPE · OPERATING SYSTEMmicrosoftwindows_vistaEnvironmental constraint · 4 assertions
Version not applicableCanonical identity product-c6332934cac78bf2604a03402cb66568f867ce86c773d4333d1205e477bf93a9Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:o:microsoft:windows_vista:-:sp1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    3a04e39a-623e-45ca-a5fc-25daa0f275a3
  2. cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 6
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    bf1ad1a1-ee20-4bce-9ee6-84b27139811c
  3. cpe:2.3:o:microsoft:windows_vista:-:sp1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 5
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    3a04e39a-623e-45ca-a5fc-25daa0f275a3
  4. cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 4
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    bf1ad1a1-ee20-4bce-9ee6-84b27139811c
NVD CPE · OPERATING SYSTEMmicrosoftwindows_xpEnvironmental constraint · 6 assertions
Version not applicableCanonical identity product-64e458557132a0a0a8bbaccf808d742614fb319511c19c0d45dd39b15a52fcc7Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 6
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c9392d35-7bf5-48e9-879b-bbde9a9e9ab9
  2. cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:professional:*:x64:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 5
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c6109348-bc79-4ed3-8d41-ea546a540c79
  3. cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:professional:*:x64:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 7
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c6109348-bc79-4ed3-8d41-ea546a540c79
  4. cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c9392d35-7bf5-48e9-879b-bbde9a9e9ab9
  5. cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 8
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c9392d35-7bf5-48e9-879b-bbde9a9e9ab9
  6. cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:*:*:x64:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    badb0479-3e0e-4326-b568-9dbdcacf0b5e

Affected-product evidence

Accepted scope and product mapping

1 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-01299a5a765aea70faa05f2d06e0c26a5d498fd34553e868d89e8a43b31864db · product-d26e3505f2452daa926474c7ca23fc78f73a7b20902783174428ff8d6e276baa

Source class
Nvd cpe vulnerable target
Assertions
3
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
15d29741-789e-4543-8811-e52b1c7f378953058b92-35ff-4940-90a9-f4e81614aa9b81aeff7b-d5bb-4c6d-b819-78e20584e4b0
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
Aug 27, 2026
Retained assertion IDs
fc9a62e2-d3dc-4b44-9de9-3411a2012393

Assessments

CVSS by origin

9.3
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:M/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.