CASCACascade Atlas

Evidence dossier

CVE-2023-26359

Adobe ColdFusion Deserialization of Untrusted Data Arbitrary code execution

Exploited in the wild (CISA KEV since Aug 21, 2023). adobe reports CVSS 3.1 9.8. EPSS estimates 17.0% exploit likelihood as of Aug 27, 2026.

75.4–76.9Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction.

State
PUBLISHED
Published
Mar 23, 2023
Updated
Oct 21, 2025
Evidence coverage
99%

Evidence chronology

What was known when

Download this view's receipt →
  1. Source dateSource date omittedFirst observed by CASCA
    adobe

    Record text: Adobe ColdFusion Deserialization of Untrusted Data Arbitrary code execution

    Inspect raw assertion
    Field
    container
    Value
    Adobe ColdFusion Deserialization of Untrusted Data Arbitrary code execution
    Original evidence ↗
  2. 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 ↗
  3. 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 ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Adobe ColdFusion Deserialization of Untrusted Data Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Adobe ColdFusion Deserialization of Untrusted Data Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 16.99% probability · 96.84th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.169880000000; percentile 0.968350000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Aug 21, 2023 · first observed Jul 19, 2026

Exploit likelihood16.99%

FIRST EPSS · score date Aug 27, 2026 · 96.8th percentile · first observed Aug 27, 2026

SeverityCVSS 9.8

adobe · 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

adobeOriginal assertion
Record text

Adobe ColdFusion Deserialization of Untrusted Data Arbitrary code execution

Inspect raw assertion
Field
container
Value
Adobe ColdFusion Deserialization of Untrusted Data Arbitrary code execution
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
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 ↗
CISA KEVOriginal assertion
Exploitation cataloged

Adobe ColdFusion Deserialization of Untrusted Data Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Adobe ColdFusion Deserialization of Untrusted Data Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

16.99% probability · 96.84th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.169880000000; percentile 0.968350000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
22Underlying assertions
1Canonical products
22Target 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

2 scope groups

adobe · source assertedAdobeColdFusionDirect source scope
Affected: unspecified through CF2018U15, CF2021U5 (custom comparison)Affected: unspecified through None (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "unspecified", "versionType": "custom", "lessThanOrEqual": "CF2018U15, CF2021U5"}, {"status": "affected", "version": "unspecified", "versionType": "custom", "lessThanOrEqual": "None"}]
NVD CPE · APPLICATIONadobecoldfusionVulnerable target · 22 assertions
Version 2018; Version 2021Canonical identity product-40c507acd7e9f9a6fe8bc1b45cc600068bd553a29d1397a3d2e038f0deeda04dLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:a:adobe:coldfusion:2021:update2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 18
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    d57c8681-ac68-47df-a61e-b5c4b4a47663
  2. cpe:2.3:a:adobe:coldfusion:2018:update4:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 10
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    58d32489-627b-4e49-9329-8a3b8f8e4903
  3. cpe:2.3:a:adobe:coldfusion:2018:update6:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 12
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    9f9336cc-e38f-4bcb-83cd-805ec7fef806
  4. cpe:2.3:a:adobe:coldfusion:2018:update7:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 13
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    97964507-047a-4cc8-8d2b-0ea0c7f9bd50
  5. cpe:2.3:a:adobe:coldfusion:2018:update2:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 8
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    59649177-81ee-43c3-bfa5-e56e65b486df
  6. cpe:2.3:a:adobe:coldfusion:2021:update4:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 20
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    7773db68-414a-4ba9-960f-52471a784379
  7. cpe:2.3:a:adobe:coldfusion:2021:update1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 17
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    afd05e3a-10f9-4c75-9710-ba46b66ff6e6
  8. cpe:2.3:a:adobe:coldfusion:2018:update12:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 4
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    3e3bf53e-2c0d-4f79-8b62-4c2a50cb5f52
  9. cpe:2.3:a:adobe:coldfusion:2021:update5:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 21
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    b38b9e86-bcd5-4bca-8fb7-ec55905184e6
  10. cpe:2.3:a:adobe:coldfusion:2018:update10:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    8ddd85df-69a0-476f-8365-cd67c75cf0ce
  11. cpe:2.3:a:adobe:coldfusion:2018:update13:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 5
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c26bf72c-e991-4170-b68b-09b20b6c0679
  12. cpe:2.3:a:adobe:coldfusion:2018:update8:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 14
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    82208628-f32a-4380-9b0f-dc8507e7701d
  13. cpe:2.3:a:adobe:coldfusion:2018:update15:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 7
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    831e8d69-62e9-4778-8cc5-d6d45cf5ab6f
  14. cpe:2.3:a:adobe:coldfusion:2021:-:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 16
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    7a94b406-c011-4673-8c2b-0dd94d46cc4c
  15. cpe:2.3:a:adobe:coldfusion:2018:update3:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 9
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    453b96ed-738a-4642-b461-c5216cf45ca3
  16. cpe:2.3:a:adobe:coldfusion:2021:update3:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 19
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    75608383-b727-48d6-8ffa-d552a338a562
  17. cpe:2.3:a:adobe:coldfusion:2018:update9:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 15
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    1563ce5e-a4f7-40a4-a050-bb96e332d8dd
  18. cpe:2.3:a:adobe:coldfusion:2018:update11:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    23f63675-7817-4af0-a7db-5e35edabf04e
  19. cpe:2.3:a:adobe:coldfusion:2018:-:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    3b54b2b0-b1e1-4b4e-a529-d0bd3b5deef3
  20. cpe:2.3:a:adobe:coldfusion:2018:update5:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 11
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    6d5860e1-d293-48fe-9796-058b78b2d571
  21. cpe:2.3:a:adobe:coldfusion:2018:update1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    edb126bf-e09d-4e58-a39f-1190407d1cab
  22. cpe:2.3:a:adobe:coldfusion:2018:update14:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 6
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    25b4b4f2-318f-4046-ade5-e9dd64f83fd9

Affected-product evidence

Accepted scope and product mapping

1 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-70d8e9d1eb9ce5b2e6b4c9351aebc88bced6ea77611cbc8d5cdbe8115b6faed8 · product-40c507acd7e9f9a6fe8bc1b45cc600068bd553a29d1397a3d2e038f0deeda04d

Source class
Nvd cpe vulnerable target
Assertions
22
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
0c08730a-025b-4b40-b3b2-db28a94b56cc29e5327b-6624-4bfd-b9ac-54ac5f4bbabc56895ef2-3d5c-4363-9923-a749b2ff7c0858f29241-6e13-43c6-bc6a-d37229b370305c05cca9-a8c2-46f6-b009-2e4e62ec6de99ce88d8d-9d66-427a-a2e5-c2ec71b0fe2c9d6a76ad-1ff9-4e87-abe6-d5cc9e3324369d6cb5e1-45a7-4c13-a7c3-30f5bebf5b86a7cd4ba0-89f3-44f0-8e5a-04d64c5121b1a9b511aa-7b35-4d11-8af3-7b4d12cc06b7b51483d1-995a-4548-a763-642827007c0db77dc24e-88d0-41f1-91dc-3a6d45f146c2c10bd8eb-2b4c-4eb7-9b02-b8106bdd39abc3f8cff3-8b0b-4fa0-a3c4-e2462e517719c6325265-eeb5-45c6-9b41-dbb594b85bb1d2684bf6-aeb1-4f4a-acc4-ad62416f026dd68b4e8b-e04d-4ff4-a195-6ca02bd4e353da130bb0-c1cb-44ee-bd1a-d83a84b84a6ce18557a1-c98c-4ecc-8750-da85a73aaa92e6d32d6e-616e-4135-855f-a49b32dfab42ef6f2547-bc91-47d1-a00f-4658f036b57af77d47ca-514c-4467-a639-a4b33c0faf0f
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
c8f92efa-8497-4692-9710-145dc7b72e15

Assessments

CVSS by origin

9.8
psirt@adobe.comCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
adobeCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

9.8Priority eligible

adobe

CVSS 3.1 · Primary · Original assertion · rank 1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
9.8
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.