CASCACascade Atlas

Evidence dossier

CVE-2021-20035

Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which…

Exploited in the wild (CISA KEV since Apr 16, 2025). NVD reports CVSS 3.1 6.5. EPSS estimates 4.1% exploit likelihood as of Aug 27, 2026.

65.3–66.3Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.

State
PUBLISHED
Published
Sep 27, 2021
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
    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
    sonicwall

    Record text: Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.

    Inspect raw assertion
    Field
    container
    Value
    Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: SonicWall SMA100 Appliances OS Command Injection Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    SonicWall SMA100 Appliances OS Command Injection Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 4.15% probability · 90.1th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.041460000000; percentile 0.901030000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Apr 16, 2025 · first observed Jul 19, 2026

Exploit likelihood4.15%

FIRST EPSS · score date Aug 27, 2026 · 90.1th percentile · first observed Aug 27, 2026

SeverityCVSS 6.5

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 ↗
sonicwallOriginal assertion
Record text

Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.

Inspect raw assertion
Field
container
Value
Improper neutralization of special elements in the SMA100 management interface allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user which potentially leads to DoS.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

SonicWall SMA100 Appliances OS Command Injection Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
SonicWall SMA100 Appliances OS Command Injection Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

4.15% probability · 90.1th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.041460000000; percentile 0.901030000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
19Underlying assertions
9Canonical products
15Target assertions
4Constraint assertions

Grouped from 9 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

10 scope groups

sonicwall · source assertedSonicWallSMA100Direct source scope
Affected: 9.0.0.10-28sv and earlierAffected: 10.2.0.7-34sv and earlierAffected: 10.2.1.0-17sv and earlier
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "9.0.0.10-28sv and earlier"}, {"status": "affected", "version": "10.2.0.7-34sv and earlier"}, {"status": "affected", "version": "10.2.1.0-17sv and earlier"}]
NVD CPE · HARDWAREsonicwallsma_200Environmental constraint · 1 assertions
Version not applicableCanonical identity product-91e31bab8ca12568b55fbef81208d65415eb9ae4c788d26be09141b79c89fe9dLinked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:sonicwall:sma_200:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    0b190266-ad6f-401b-9b2e-061cdd539236
NVD CPE · OPERATING SYSTEMsonicwallsma_200_firmwareVulnerable target · 3 assertions
Any version (unconstrained) (>= 10.2.0.0, < 10.2.0.8-37sv); Any version (unconstrained) (>= 10.2.1.0, < 10.2.1.1-19sv); Any version (unconstrained) (< 9.0.0.11-31sv)Canonical identity product-1a893bd70f781870bc12b4b23d779710e6905e394bbc481fb889b05ce4182e74Linked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    from including 10.2.1.0; through excluding 10.2.1.1-19sv
    Match ID
    a53e73ed-ce3d-4e81-ba96-5160ce726a96
  2. cpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 10.2.0.0; through excluding 10.2.0.8-37sv
    Match ID
    2353d2ad-1943-4400-a7f9-884d38657ce4
  3. cpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 9.0.0.11-31sv
    Match ID
    1cae16b5-709a-40e9-9c49-ea5dfa685299
NVD CPE · HARDWAREsonicwallsma_210Environmental constraint · 1 assertions
Version not applicableCanonical identity product-550c36468c01a04863339c98e9cf24a57015da41e26d7cfe3817f5627349f033Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:sonicwall:sma_210:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    51587338-4a5f-41fc-9497-743f061947c2
NVD CPE · OPERATING SYSTEMsonicwallsma_210_firmwareVulnerable target · 3 assertions
Any version (unconstrained) (>= 10.2.0.0, < 10.2.0.8-37sv); Any version (unconstrained) (>= 10.2.1.0, < 10.2.1.1-19sv); Any version (unconstrained) (< 9.0.0.11-31sv)Canonical identity product-26a307663a0d7d21d37685d5626bda794a31e21aa834b2d2545700514a0e4c1bLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 9.0.0.11-31sv
    Match ID
    47bfda65-a16b-4983-9f7b-0b93de953926
  2. cpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 2
    Logic
    OR
    Version bounds
    from including 10.2.1.0; through excluding 10.2.1.1-19sv
    Match ID
    87c8d809-a71e-4c51-9f43-69c867e5e81f
  3. cpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 10.2.0.0; through excluding 10.2.0.8-37sv
    Match ID
    bb4a2769-6449-4c24-8a4f-ee38a8cc32ec
NVD CPE · HARDWAREsonicwallsma_400Environmental constraint · 1 assertions
Version not applicableCanonical identity product-281c97c08cce404bae4214669fa0d9b53f5e61e0badba682846d190c941a89dfLinked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:sonicwall:sma_400:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    9d728332-10c9-4508-b720-569d44e99543
NVD CPE · OPERATING SYSTEMsonicwallsma_400_firmwareVulnerable target · 3 assertions
Any version (unconstrained) (>= 10.2.0.0, < 10.2.0.8-37sv); Any version (unconstrained) (>= 10.2.1.0, < 10.2.1.1-19sv); Any version (unconstrained) (< 9.0.0.11-31sv)Canonical identity product-e8581ca167a037abd2310f553d0f4f5493779f3b17ce222e83b9e7f474047868Linked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    2 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 10.2.0.0; through excluding 10.2.0.8-37sv
    Match ID
    b45bcc41-d7f1-4242-8501-0e1ac2bd81a5
  2. cpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    2 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 9.0.0.11-31sv
    Match ID
    b0b3ec70-4a0c-4281-80ac-1e004e1d5346
  3. cpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    2 · node/0 · match 2
    Logic
    OR
    Version bounds
    from including 10.2.1.0; through excluding 10.2.1.1-19sv
    Match ID
    8bc841ee-6c00-402c-acf4-ce4536edfbcc
NVD CPE · HARDWAREsonicwallsma_410Environmental constraint · 1 assertions
Version not applicableCanonical identity product-7fe9cf3dc83085f07a35eb26b64c02c3a3315073c07277a9510b70c9dd839ef5Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:sonicwall:sma_410:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    3 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    9dfb8fbc-ffa4-4526-b306-d5692a43dc9e
NVD CPE · OPERATING SYSTEMsonicwallsma_410_firmwareVulnerable target · 3 assertions
Any version (unconstrained) (>= 10.2.0.0, < 10.2.0.8-37sv); Any version (unconstrained) (>= 10.2.1.0, < 10.2.1.1-19sv); Any version (unconstrained) (< 9.0.0.11-31sv)Canonical identity product-a7f75ceec8c377c339cb86a182bbed18843ccfe642ca6bfccc536cc48e24fa59Linked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    3 · node/0 · match 2
    Logic
    OR
    Version bounds
    from including 10.2.1.0; through excluding 10.2.1.1-19sv
    Match ID
    34da5394-545b-48ed-9971-7761aec0278f
  2. cpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    3 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 9.0.0.11-31sv
    Match ID
    999c0747-aff2-4abf-b8f0-a89202c1acf4
  3. cpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    3 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 10.2.0.0; through excluding 10.2.0.8-37sv
    Match ID
    a24369c9-53ee-4914-85de-e95b8737ce8a
NVD CPE · APPLICATIONsonicwallsma_500vVulnerable target · 3 assertions
Any version (unconstrained) (>= 10.2.0.0, < 10.2.0.8-37sv); Any version (unconstrained) (>= 10.2.1.0, < 10.2.1.1-19sv); Any version (unconstrained) (< 9.0.0.11-31sv)Canonical identity product-7108dc9ff86084e70b7648f009224f7d219ce93d05a4a9854e23856d6d2ae6bbLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:a:sonicwall:sma_500v:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    4 · node/0 · match 2
    Logic
    OR
    Version bounds
    from including 10.2.1.0; through excluding 10.2.1.1-19sv
    Match ID
    681ce4bd-c1f0-4737-88ae-3b555b85c33b
  2. cpe:2.3:a:sonicwall:sma_500v:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    4 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 9.0.0.11-31sv
    Match ID
    de6fe067-0b1a-4065-9218-7c6dd0d8a76e
  3. cpe:2.3:a:sonicwall:sma_500v:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    4 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 10.2.0.0; through excluding 10.2.0.8-37sv
    Match ID
    e86e27a1-5953-48c1-acd0-3080af643746

Affected-product evidence

Accepted scope and product mapping

5 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-88ea7b4aa6d07152b297937bc7e73efc70d62904e8122e245a64c5b028d9fab0 · product-1a893bd70f781870bc12b4b23d779710e6905e394bbc481fb889b05ce4182e74

Source class
Nvd cpe vulnerable target
Assertions
3
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
b1b1102d-d3a8-49d0-b2d8-321a7144c056d0570735-fd88-45ad-8ac3-a45a9e2d8116e588cac2-d6ec-4d91-a004-f1a5cb0259e8
Mapping establishedEvidence supported

vendor-88ea7b4aa6d07152b297937bc7e73efc70d62904e8122e245a64c5b028d9fab0 · product-26a307663a0d7d21d37685d5626bda794a31e21aa834b2d2545700514a0e4c1b

Source class
Nvd cpe vulnerable target
Assertions
3
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
5525270d-a672-4202-b15a-ae3c1cab8194a1fe0fad-4c2d-419c-a066-8aa7e6bdadf7efe88b62-ec63-4c09-99ef-7982e8692cc2
Mapping establishedEvidence supported

vendor-88ea7b4aa6d07152b297937bc7e73efc70d62904e8122e245a64c5b028d9fab0 · product-7108dc9ff86084e70b7648f009224f7d219ce93d05a4a9854e23856d6d2ae6bb

Source class
Nvd cpe vulnerable target
Assertions
3
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
3a94f0b7-6b4d-4616-94d9-06bd5656e0223b248db0-6e32-45a9-8bda-c55da19be92650652c09-634e-4dd0-999d-aa435002c8a2
Mapping establishedEvidence supported

vendor-88ea7b4aa6d07152b297937bc7e73efc70d62904e8122e245a64c5b028d9fab0 · product-a7f75ceec8c377c339cb86a182bbed18843ccfe642ca6bfccc536cc48e24fa59

Source class
Nvd cpe vulnerable target
Assertions
3
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
0a44795c-7527-40b0-acbd-797c46a5a8c71526b11a-93b0-4224-bb5b-847551c7cced822ab46e-bb77-444f-afa6-4640c35289c2
Mapping establishedEvidence supported

vendor-88ea7b4aa6d07152b297937bc7e73efc70d62904e8122e245a64c5b028d9fab0 · product-e8581ca167a037abd2310f553d0f4f5493779f3b17ce222e83b9e7f474047868

Source class
Nvd cpe vulnerable target
Assertions
3
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
1671c73b-41f6-47cd-87ca-d22b19a480bf3af53a61-baa7-45e7-9f1d-98541e37dfe4ed3a2014-b085-4c2e-b2f3-0e6505c7a5e9
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
f413478e-25ee-4609-9fe4-90dc46192386

Assessments

CVSS by origin

6.5
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:L/Au:S/C:N/I:N/A:C
6.5
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5
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:N/I:N/A:H

Direct CVE/CNA normalized decisions

6.5Priority 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:N/I:N/A:H
Validation
Valid match
Recomputed
6.5
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.