CASCACascade Atlas

Evidence dossier

CVE-2026-1731

Remote code execution vulnerability in BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA)

Exploited in the wild (CISA KEV since Feb 13, 2026). BT reports CVSS 4.0 9.9. EPSS estimates 88.6% exploit likelihood as of Aug 26, 2026.

87.1–88.4Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

BeyondTrust Remote Support (RS) and certain older versions of Privileged Remote Access (PRA) contain a critical pre-authentication remote code execution vulnerability. By sending specially crafted requests, an unauthenticated remote attacker may be able to execute operating system commands in the context of the site user.

State
PUBLISHED
Published
Feb 6, 2026
Updated
Feb 26, 2026
Evidence coverage
95%

Evidence chronology

What was known when

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

    Record text: Remote code execution vulnerability in BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA)

    Inspect raw assertion
    Field
    container
    Value
    Remote code execution vulnerability in BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA)
    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 dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection Vulnerability
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 88.59% probability · 99.76th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.885860000000; percentile 0.997610000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Feb 13, 2026 · first observed Jul 19, 2026

Exploit likelihood88.59%

FIRST EPSS · score date Aug 26, 2026 · 99.8th percentile · first observed Aug 26, 2026

SeverityCVSS 9.9

BT · CVSS 4.0 · 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

BTOriginal assertion
Record text

Remote code execution vulnerability in BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA)

Inspect raw assertion
Field
container
Value
Remote code execution vulnerability in BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA)
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 ↗
CISA KEVOriginal assertion
Exploitation cataloged

BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
BeyondTrust Remote Support (RS) and Privileged Remote Access (PRA) OS Command Injection Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

88.59% probability · 99.76th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.885860000000; percentile 0.997610000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
2Underlying assertions
2Canonical products
2Target 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

3 scope groups

BT · source assertedBeyondTrustRemote Support(RS) & Privileged Remote Access(PRA)Direct source scope
Affected: 0 through RS 25.3.1 (custom comparison)Affected: 0 through PRA 24.3.4 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "RS 25.3.1"}, {"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "PRA 24.3.4"}]
NVD CPE · APPLICATIONbeyondtrustprivileged_remote_accessVulnerable target · 1 assertions
Any version (unconstrained) (< 25.1)Canonical identity product-4a83b4ca386a6141561547fff87ab3460e810deb386bf26e70bf478b91c8d5e2Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:beyondtrust:privileged_remote_access:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 25.1
    Match ID
    a82d26fe-8791-41bc-a71b-4c2feb81c41c
NVD CPE · APPLICATIONbeyondtrustremote_supportVulnerable target · 1 assertions
Any version (unconstrained) (< 25.3.2)Canonical identity product-9ccca9f4886240d70ae4b2762833b957f2a28fd7e983cdd1917a149ec97542eaLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:beyondtrust:remote_support:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    through excluding 25.3.2
    Match ID
    178845b4-26d3-4c94-aed9-1c847b9357f1

Affected-product evidence

Accepted scope and product mapping

2 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-c65f06a74a92d3c757d3f4bef8da4044306168b1e57a0c1af5a3ee0251e11f5c · product-4a83b4ca386a6141561547fff87ab3460e810deb386bf26e70bf478b91c8d5e2

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
15d28d71-965c-4544-9019-66ac2cb93df9
Mapping establishedEvidence supported

vendor-c65f06a74a92d3c757d3f4bef8da4044306168b1e57a0c1af5a3ee0251e11f5c · product-9ccca9f4886240d70ae4b2762833b957f2a28fd7e983cdd1917a149ec97542ea

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
263a05c5-2cfc-4b55-a2e7-14e72f3bd445
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
74eb09fc-e41b-4329-85d1-e80c1854f1d2

Assessments

CVSS by origin

9.8
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.9
CVE Program sourceCVSS 4.0 · role Secondary · priority eligiblevalid_matchCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
9.9
BTCVSS 4.0 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:H/SA:L

Direct CVE/CNA normalized decisions

9.9Priority eligible

BT

CVSS 4.0 · Primary · Original assertion · rank 1

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:H/SA:L
Validation
Valid match
Recomputed
9.9
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.