CASCACascade Atlas

Evidence dossier

CVE-2019-1297

A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Remote Code…

Exploited in the wild (CISA KEV since Mar 3, 2022). NVD reports CVSS 3.1 8.8. EPSS estimates 21.8% exploit likelihood as of Aug 27, 2026.

75.5–78.2Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Remote Code Execution Vulnerability'.

State
PUBLISHED
Published
Sep 11, 2019
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: A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Remote Code Execution Vulnerability'.

    Inspect raw assertion
    Field
    container
    Value
    A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Remote Code Execution Vulnerability'.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Microsoft Excel Remote Code Execution Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Microsoft Excel Remote Code Execution Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 21.81% probability · 97.46th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.218050000000; percentile 0.974590000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Mar 3, 2022 · first observed Jul 19, 2026

Exploit likelihood21.80%

FIRST EPSS · score date Aug 27, 2026 · 97.5th percentile · first observed Aug 27, 2026

SeverityCVSS 8.8

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 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

A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Remote Code Execution Vulnerability'.

Inspect raw assertion
Field
container
Value
A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Remote Code Execution Vulnerability'.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Microsoft Excel Remote Code Execution Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Microsoft Excel Remote Code Execution Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

21.81% probability · 97.46th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.218050000000; percentile 0.974590000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
8Underlying assertions
3Canonical products
8Target 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

6 scope groups

microsoft · source assertedMicrosoftMicrosoft ExcelDirect source scope
Affected: 2010 Service Pack 2 (32-bit editions)Affected: 2010 Service Pack 2 (64-bit editions)Affected: 2013 Service Pack 1 (32-bit editions)Affected: 2013 Service Pack 1 (64-bit editions)Affected: 2013 RT Service Pack 1Affected: 2016 (32-bit edition)Affected: 2016 (64-bit edition)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "2010 Service Pack 2 (32-bit editions)"}, {"status": "affected", "version": "2010 Service Pack 2 (64-bit editions)"}, {"status": "affected", "version": "2013 Service Pack 1 (32-bit editions)"}, {"status": "affected", "version": "2013 Service Pack 1 (64-bit editions)"}, {"status": "affected", "version": "2013 RT Service Pack 1"}, {"status": "affected", "version": "2016 (32-bit edition)"}, {"status": "affected", "version": "2016 (64-bit edition)"}]
microsoft · source assertedMicrosoftMicrosoft OfficeDirect source scope
Affected: 2016 for MacAffected: 2019 for 32-bit editionsAffected: 2019 for 64-bit editionsAffected: 2019 for Mac
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "2016 for Mac"}, {"status": "affected", "version": "2019 for 32-bit editions"}, {"status": "affected", "version": "2019 for 64-bit editions"}, {"status": "affected", "version": "2019 for Mac"}]
microsoft · source assertedMicrosoftOffice 365 ProPlusDirect source scope
Affected: 32-bit SystemsAffected: 64-bit Systems
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "32-bit Systems"}, {"status": "affected", "version": "64-bit Systems"}]
NVD CPE · APPLICATIONmicrosoftexcelVulnerable target · 4 assertions
Version 2010; Version 2013; Version 2016Canonical identity product-1583a0890c2b29ac138d93d8997cbf1b2f38a707f8b4b5b3d38e281b544e22acLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    09bf0981-749e-470b-a7ac-95ad087797ef
  2. cpe:2.3:a:microsoft:excel:2010:sp2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    e36d981e-e56d-46c7-9486-fc691a75c497
  3. cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    f564117d-450d-45c4-9688-af35f630a8a7
  4. cpe:2.3:a:microsoft:excel:2013:sp1:*:*:rt:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    3a062169-527e-43da-8ae0-fd4fba1b2a9b
NVD CPE · APPLICATIONmicrosoftofficeVulnerable target · 3 assertions
Version 2016; Version 2019Canonical identity product-f4efee17050cd92d62299077c43827052b373ddcb783c02caa43c2fbb378d2f4Linked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:a:microsoft:office:2016:*:*:*:*:macos:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 4
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    8b615d7a-b7f2-44df-8699-eb8367ade65c
  2. cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 6
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    40961b9e-80b6-42e0-a876-58b3ce056e4e
  3. cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 5
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ff177984-a906-43fa-bf60-298133fbbd6b
NVD CPE · APPLICATIONmicrosoftoffice_365_proplusVulnerable target · 1 assertions
Version not applicableCanonical identity product-cb82257f4a10e2b6e7a48f720dd3849f919cff8ebf37c7808f7693bc4814a646Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 7
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ca035812-f35a-43f1-9a8d-ee02201aa10a

Affected-product evidence

Accepted scope and product mapping

3 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-01299a5a765aea70faa05f2d06e0c26a5d498fd34553e868d89e8a43b31864db · product-1583a0890c2b29ac138d93d8997cbf1b2f38a707f8b4b5b3d38e281b544e22ac

Source class
Nvd cpe vulnerable target
Assertions
4
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
0d6230ed-2b82-4b44-9321-f7b932e6b2e2921a83ea-d5a0-416e-96fd-f7ff294509bda7b13221-4386-456f-8f30-49be18facfb1c19323ff-7917-493e-ace6-a39e75a51ce1
Mapping establishedEvidence supported

vendor-01299a5a765aea70faa05f2d06e0c26a5d498fd34553e868d89e8a43b31864db · product-cb82257f4a10e2b6e7a48f720dd3849f919cff8ebf37c7808f7693bc4814a646

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
8357e234-c510-408d-8870-2bf2bd5acc6e
Mapping establishedEvidence supported

vendor-01299a5a765aea70faa05f2d06e0c26a5d498fd34553e868d89e8a43b31864db · product-f4efee17050cd92d62299077c43827052b373ddcb783c02caa43c2fbb378d2f4

Source class
Nvd cpe vulnerable target
Assertions
3
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
2a631aca-2a2b-44ee-9ce6-31925d9e074c6eeb17c1-cabd-4a9a-8375-9f6969df9652e5cbb18d-2e7d-4410-b5f7-266924117cbc
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
3
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
41805211-3656-4c74-a9f0-0b78666e9dc26c75cfa7-28bf-4578-8b13-d97c8caa9ef18d2ac346-accf-4301-9771-eac74882d860

Assessments

CVSS by origin

8.8
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.3
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:M/Au:N/C:C/I:C/A:C
8.8
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8
CISA-ADPCVSS 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:H/I:H/A:H

Direct CVE/CNA normalized decisions

8.8Priority eligible

CISA-ADP

CVSS 3.1 · Secondary · Independent enrichment · rank 2

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
8.8
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.