CISA KEV · catalog date Jun 8, 2022 · first observed Jul 19, 2026
Evidence dossier
CVE-2012-4969
Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a…
Exploited in the wild (CISA KEV since Jun 8, 2022). NVD reports CVSS 3.1 8.1. EPSS estimates 81.7% exploit likelihood as of Aug 26, 2026.
As of Aug 27, 2026
Normalized restatement
Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.
- State
- PUBLISHED
- Published
- Sep 18, 2012
- Updated
- Oct 22, 2025
- Evidence coverage
- 97%
Evidence chronology
What was known when
- Source dateSource date omittedFirst observed by CASCACISA-ADPOriginal evidence ↗
Record text: CISA ADP Vulnrichment
Inspect raw assertion
- Field
container- Value
- CISA ADP Vulnrichment
- Source dateSource date omittedFirst observed by CASCACVE ProgramOriginal evidence ↗
Record text: CVE Program Container
Inspect raw assertion
- Field
container- Value
- CVE Program Container
- Source dateSource date omittedFirst observed by CASCAmitreOriginal evidence ↗
Record text: Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.
Inspect raw assertion
- Field
container- Value
- Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.
- Source dateFirst observed by CASCACISA KEVOriginal evidence ↗
Exploitation cataloged: Microsoft Internet Explorer Use-After-Free Vulnerability
Inspect raw assertion
- Field
observed_exploitation- Value
- Microsoft Internet Explorer Use-After-Free Vulnerability
- Source dateFirst observed by CASCAFIRST EPSSOriginal evidence ↗
EPSS score: 81.72% probability · 99.62th percentile
Inspect raw assertion
- Field
model_probability- Value
- Probability 0.817160000000; percentile 0.996170000000
FIRST EPSS · score date Aug 26, 2026 · 99.6th percentile · first observed Aug 26, 2026
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-v1Eligible evidence is present for this bounded claim.
- Revision
- evidence-policy-v1.1.0
- Cutoff
- Aug 27, 2026
- Resolution
- None
Eligible evidence is present for this bounded claim.
- Revision
- evidence-policy-v1.1.0
- Cutoff
- Aug 27, 2026
- Resolution
- None
Eligible evidence is present for this bounded claim.
- Revision
- casca-direct-cvss-eligibility-v1
- Cutoff
- Aug 27, 2026
- Resolution
- None
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 ADP Vulnrichment
Inspect raw assertion
- Field
container- Value
- CISA ADP Vulnrichment
CVE Program Container
Inspect raw assertion
- Field
container- Value
- CVE Program Container
Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.
Inspect raw assertion
- Field
container- Value
- Use-after-free vulnerability in the CMshtmlEd::Exec function in mshtml.dll in Microsoft Internet Explorer 6 through 9 allows remote attackers to execute arbitrary code via a crafted web site, as exploited in the wild in September 2012.
Microsoft Internet Explorer Use-After-Free Vulnerability
Inspect raw assertion
- Field
observed_exploitation- Value
- Microsoft Internet Explorer Use-After-Free Vulnerability
81.72% probability · 99.62th percentile
Inspect raw assertion
- Field
model_probability- Value
- Probability 0.817160000000; percentile 0.996170000000
Applicability
Cited product scope
Grouped from 8 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 2026-07-21T06:45:29.809Z
27d65b0f-b718-4b4f-bb79-c47c68d09dfa - Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z
955dae73-7302-438b-aee1-058d7cc5d48e
7 scope groups
Canonical linkage remains open; the cited source assertion is retained below.
Inspect raw assertion
[{"status": "affected", "version": "n/a"}]product-d26e3505f2452daa926474c7ca23fc78f73a7b20902783174428ff8d6e276baaLinked exactInspect raw assertions
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
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
cpe:2.3:a:microsoft:internet_explorer:9:*:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Vulnerable target
- Configuration
- 3 · node/0 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
c043eddd-41bf-4718-bdcf-158bbbdb6360
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
product-f20a05098a41a238f96b56b817d0482887bb39ad40620198bbe05da10ee02ffcLinked exactInspect raw assertions
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 1
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
7fe8b00b-4f39-4755-a323-8ad71f5e3ebe
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 3
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
7fe8b00b-4f39-4755-a323-8ad71f5e3ebe
cpe:2.3:o:microsoft:windows_7:*:*:*:*:*:*:-:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
d14cae73-1240-4f07-9dee-0ffa43d74b20
cpe:2.3:o:microsoft:windows_7:*:*:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 1
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
deb02d84-adc8-4297-b388-d5bda4eb4b82
cpe:2.3:o:microsoft:windows_7:-:-:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 2
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
a5c07306-d850-450e-b4d0-d3c3351a6fe9
cpe:2.3:o:microsoft:windows_7:-:-:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 0
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
a5c07306-d850-450e-b4d0-d3c3351a6fe9
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x86:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 4
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
06bbfa69-94e2-4bab-afd3-bc434b11d106
product-21c8a455c6651c09ac3fd0874c5219dd6081913f4835e8de22662b3821fec60bLinked exactInspect raw assertions
cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:itanium:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 1
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
9f98ae07-3995-4501-9804-fea5a87adfad
cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:itanium:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 0 · node/1 · match 1
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
9f98ae07-3995-4501-9804-fea5a87adfad
cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 3
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
a7371547-290d-4d0d-b98d-ca28b4d2e8b0
cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 2
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
a7371547-290d-4d0d-b98d-ca28b4d2e8b0
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
cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 2
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
1d929aa2-ee0b-4aa1-805d-69bcca11b77f
cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 0 · node/1 · match 2
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
a7371547-290d-4d0d-b98d-ca28b4d2e8b0
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
product-217b1ab3d25f361a639824f86753d418b35aa2a816ee370bb71b5d1dd883d87aLinked exactInspect raw assertions
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 3
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
5f422a8c-2c4e-42c8-b420-e0728037e15c
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 5
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
5f422a8c-2c4e-42c8-b420-e0728037e15c
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 4
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
5f422a8c-2c4e-42c8-b420-e0728037e15c
cpe:2.3:o:microsoft:windows_server_2008:r2:*:*:*:*:*:itanium:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 6
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
b20dd263-5a62-4cb1-bd47-d1f9a6c67e08
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:itanium:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 8
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
b320a104-9037-487e-bc9a-62b4a6b49fd0
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 5
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
2127d10c-b6f3-4c1d-b9aa-5d78513cc996
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 9
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
af07a81d-12e5-4b1d-bff9-c8d08c32ff4f
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 5
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
2127d10c-b6f3-4c1d-b9aa-5d78513cc996
cpe:2.3:o:microsoft:windows_server_2008:r2:*:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 7
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
b7674920-ae12-4a25-be57-34aedda74d76
cpe:2.3:o:microsoft:windows_server_2008:r2:*:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 7
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
b7674920-ae12-4a25-be57-34aedda74d76
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:itanium:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 4
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
fffd8c6b-7a46-484c-8701-81d58ab1c2cf
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 6
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
2127d10c-b6f3-4c1d-b9aa-5d78513cc996
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 8
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
af07a81d-12e5-4b1d-bff9-c8d08c32ff4f
product-c6332934cac78bf2604a03402cb66568f867ce86c773d4333d1205e477bf93a9Linked exactInspect raw assertions
cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 11
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
6ff85adb-8f36-424d-9f4a-bd357304ce66
cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 6
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
bf1ad1a1-ee20-4bce-9ee6-84b27139811c
cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 10
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
6ff85adb-8f36-424d-9f4a-bd357304ce66
cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 3 · node/1 · match 9
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
bf1ad1a1-ee20-4bce-9ee6-84b27139811c
cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 7
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
6ff85adb-8f36-424d-9f4a-bd357304ce66
cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 10
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
bf1ad1a1-ee20-4bce-9ee6-84b27139811c
product-64e458557132a0a0a8bbaccf808d742614fb319511c19c0d45dd39b15a52fcc7Linked exactInspect raw assertions
cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 0 · node/1 · match 4
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
c9392d35-7bf5-48e9-879b-bbde9a9e9ab9
cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:professional:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 0 · node/1 · match 3
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
c6109348-bc79-4ed3-8d41-ea546a540c79
cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 8
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
badb0479-3e0e-4326-b568-9dbdcacf0b5e
cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 13
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
c9392d35-7bf5-48e9-879b-bbde9a9e9ab9
cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:*:*:x64:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 2 · node/1 · match 12
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
badb0479-3e0e-4326-b568-9dbdcacf0b5e
cpe:2.3:o:microsoft:windows_xp:-:sp3:*:*:*:*:*:*- Official link
- Linked exact
- Role
- Environmental constraint
- Configuration
- 1 · node/1 · match 9
- Logic
- OR
- Version bounds
- No explicit bounds
- Match ID
c9392d35-7bf5-48e9-879b-bbde9a9e9ab9
Affected-product evidence
Accepted scope and product mapping
1 canonical links · 1 source-reported links
vendor-01299a5a765aea70faa05f2d06e0c26a5d498fd34553e868d89e8a43b31864db · product-d26e3505f2452daa926474c7ca23fc78f73a7b20902783174428ff8d6e276baa
- Source class
- Nvd cpe vulnerable target
- Assertions
- 4
- Mapping revision
- cpe23-exact-mapping-v1
- Observed cutoff
- Aug 27, 2026
Retained assertion IDs
40d5f886-fa52-436f-af99-3b0268453bca4773e9d2-24a3-44d3-bfd0-20ad917f6e57cba569e7-c590-4dc4-b9dc-f8ac7d8eb4aff736f2af-2ee5-423c-9c4c-93e0999c9a0aCanonical 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
09596486-d5f3-4d60-8a85-84901b0365c7Assessments
CVSS by origin
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HAV:N/AC:M/Au:N/C:C/I:C/A:CCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HDirect CVE/CNA normalized decisions
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.