CASCACascade Atlas

Evidence dossier

CVE-2020-8468

Trend Micro Apex One (2019), OfficeScan XG and Worry-Free Business Security (9.0, 9.5, 10.0) agents are affected by a content validation escape vulnerability which could allow…

Exploited in the wild (CISA KEV since Nov 3, 2021). NVD reports CVSS 3.1 8.8. EPSS estimates 5.8% exploit likelihood as of Aug 27, 2026.

70.9–72.1Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

Trend Micro Apex One (2019), OfficeScan XG and Worry-Free Business Security (9.0, 9.5, 10.0) agents are affected by a content validation escape vulnerability which could allow an attacker to manipulate certain agent client components. An attempted attack requires user authentication.

State
PUBLISHED
Published
Mar 18, 2020
Updated
Oct 21, 2025
Evidence coverage
98%

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
    trendmicro

    Record text: Trend Micro Apex One (2019), OfficeScan XG and Worry-Free Business Security (9.0, 9.5, 10.0) agents are affected by a content validation escape vulnerability which could allow an attacker to manipulate certain agent client components. An attempted attack requires user authentication.

    Inspect raw assertion
    Field
    container
    Value
    Trend Micro Apex One (2019), OfficeScan XG and Worry-Free Business Security (9.0, 9.5, 10.0) agents are affected by a content validation escape vulnerability which could allow an attacker to manipulate certain agent client components. An attempted attack requires user authentication.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Trend Micro Multiple Products Content Validation Escape Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Trend Micro Multiple Products Content Validation Escape Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 5.75% probability · 92.52th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.057540000000; percentile 0.925150000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Nov 3, 2021 · first observed Jul 19, 2026

Exploit likelihood5.75%

FIRST EPSS · score date Aug 27, 2026 · 92.5th 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 ↗
trendmicroOriginal assertion
Record text

Trend Micro Apex One (2019), OfficeScan XG and Worry-Free Business Security (9.0, 9.5, 10.0) agents are affected by a content validation escape vulnerability which could allow an attacker to manipulate certain agent client components. An attempted attack requires user authentication.

Inspect raw assertion
Field
container
Value
Trend Micro Apex One (2019), OfficeScan XG and Worry-Free Business Security (9.0, 9.5, 10.0) agents are affected by a content validation escape vulnerability which could allow an attacker to manipulate certain agent client components. An attempted attack requires user authentication.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Trend Micro Multiple Products Content Validation Escape Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Trend Micro Multiple Products Content Validation Escape Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

5.75% probability · 92.52th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.057540000000; percentile 0.925150000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
7Underlying assertions
3Canonical products
7Target 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

4 scope groups

trendmicro · source assertedTrend MicroTrend Micro OfficeScan, Trend Micro Apex One, Trend Micro Worry-Free Business Security (WFBS)Direct source scope
Affected: OfficeScan XG (12.0), Apex One 2019 (14.0), WFBS 9.0, 9.5 and 10.0
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "OfficeScan XG (12.0), Apex One 2019 (14.0), WFBS 9.0, 9.5 and 10.0"}]
NVD CPE · APPLICATIONtrendmicroapex_oneVulnerable target · 1 assertions
Version 2019Canonical identity product-c36b03ede89735893cf5eb7227d4471fd5a59b5023d788d61a15bc2c37404e58Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:trendmicro:apex_one:2019:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    af019d2d-c426-4d2d-a254-442ce777b41e
NVD CPE · APPLICATIONtrendmicroofficescanVulnerable target · 2 assertions
Version xgCanonical identity product-ddbe4be1ec1bed754a10ed087761d8367ba7e4e7c79eeb161895dc5fdd260a4eLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:a:trendmicro:officescan:xg:-:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    5f0a88d8-d7cd-4553-a60f-de8fe518be9c
  2. cpe:2.3:a:trendmicro:officescan:xg:sp1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    64600b42-4884-41f2-a683-ae1edb79372e
NVD CPE · APPLICATIONtrendmicroworry-free_business_securityVulnerable target · 4 assertions
Version 10.0; Version 9.0; Version 9.5Canonical identity product-9ed062761919e7593cb5621fedcfbc9e01b23dcc03ee3dc071be457a5a95cefaLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:a:trendmicro:worry-free_business_security:10.0:sp1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 6
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ffce8717-85d2-4f4f-91df-c6da341c4e19
  2. cpe:2.3:a:trendmicro:worry-free_business_security:9.5:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 4
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    6e482d0e-3cc6-4d32-ac2e-6a506066ecab
  3. cpe:2.3:a:trendmicro:worry-free_business_security:9.0:sp3:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    83ff66ba-6904-4d7f-944f-64896ad6cf3d
  4. cpe:2.3:a:trendmicro:worry-free_business_security:10.0:-:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 5
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    2a0edd09-fa88-46a8-a62f-551eb253f722

Affected-product evidence

Accepted scope and product mapping

3 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-8fd269160415a9916bfdec3c59c8034a460623e87d0d40380828bdbac86a50ec · product-9ed062761919e7593cb5621fedcfbc9e01b23dcc03ee3dc071be457a5a95cefa

Source class
Nvd cpe vulnerable target
Assertions
4
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
09653d1c-957a-447a-875d-38a73ef547c52bd4df62-f6e1-459f-96e6-075069b5b7167903dde5-06ef-42f1-9902-ad7b1d4ed4e5a4e3b395-7e1f-445b-9d04-87214456d54f
Mapping establishedEvidence supported

vendor-8fd269160415a9916bfdec3c59c8034a460623e87d0d40380828bdbac86a50ec · product-c36b03ede89735893cf5eb7227d4471fd5a59b5023d788d61a15bc2c37404e58

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
7810844c-e48a-493c-a0a4-5d44815c88ac
Mapping establishedEvidence supported

vendor-8fd269160415a9916bfdec3c59c8034a460623e87d0d40380828bdbac86a50ec · product-ddbe4be1ec1bed754a10ed087761d8367ba7e4e7c79eeb161895dc5fdd260a4e

Source class
Nvd cpe vulnerable target
Assertions
2
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
0f9fd881-3774-4f03-897b-6dbf1777b0bdd4971609-2f82-42ca-9b06-a79644c39d88
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
e9cdeb97-4f6d-445d-b048-e07250a7dda7

Assessments

CVSS by origin

8.8
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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:L/UI:N/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:L/UI:N/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.