CASCACascade Atlas

Evidence dossier

CVE-2021-45382

A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers via the DDNS function…

Exploited in the wild (CISA KEV since Apr 4, 2022). NVD reports CVSS 3.1 9.8. EPSS estimates 97.6% exploit likelihood as of Jul 26, 2026.

89.6–90.6Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers via the DDNS function in ncc2 binary file. Note: DIR-810L, DIR-820L, DIR-830L, DIR-826L, DIR-836L, all hardware revisions, have reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle and as such this issue will not be patched.

State
PUBLISHED
Published
Feb 17, 2022
Updated
Oct 21, 2025
Evidence coverage
97%

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
    mitre

    Record text: A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers via the DDNS function in ncc2 binary file. Note: DIR-810L, DIR-820L, DIR-830L, DIR-826L, DIR-836L, all hardware revisions, have reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle and as such this issue will not be patched.

    Inspect raw assertion
    Field
    container
    Value
    A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers via the DDNS function in ncc2 binary file. Note: DIR-810L, DIR-820L, DIR-830L, DIR-826L, DIR-836L, all hardware revisions, have reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle and as such this issue will not be patched.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: D-Link Multiple Routers Remote Code Execution Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    D-Link Multiple Routers Remote Code Execution Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 97.64% probability · 99.9th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.976430000000; percentile 0.998960000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Apr 4, 2022 · first observed Jul 19, 2026

Exploit likelihood97.64%

FIRST EPSS · score date Jul 26, 2026 · 99.9th percentile · first observed Jul 27, 2026

SeverityCVSS 9.8

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 ↗
mitreOriginal assertion
Record text

A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers via the DDNS function in ncc2 binary file. Note: DIR-810L, DIR-820L, DIR-830L, DIR-826L, DIR-836L, all hardware revisions, have reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle and as such this issue will not be patched.

Inspect raw assertion
Field
container
Value
A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers via the DDNS function in ncc2 binary file. Note: DIR-810L, DIR-820L, DIR-830L, DIR-826L, DIR-836L, all hardware revisions, have reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle and as such this issue will not be patched.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

D-Link Multiple Routers Remote Code Execution Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
D-Link Multiple Routers Remote Code Execution Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

97.64% probability · 99.9th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.976430000000; percentile 0.998960000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
12Underlying assertions
12Canonical products
6Target assertions
6Constraint assertions

Grouped from 12 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

13 scope groups

mitre · source assertedn/an/aDirect source scope
Affected: n/a
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "n/a"}]
NVD CPE · HARDWAREdlinkdir-810lEnvironmental constraint · 1 assertions
Version not applicableCanonical identity product-a6cd94951d84f6a2965094b8879bfdf9d7fddf5b5c06842ed73f165c8098041aLinked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:dlink:dir-810l:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    5 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    8b79563c-609a-4f9f-8f2f-fff3d10e6684
NVD CPE · OPERATING SYSTEMdlinkdir-810l_firmwareVulnerable target · 1 assertions
Version not applicableCanonical identity product-95c81649557094c7570667986dbd69caf3fc7cea282c9052ca62e1338f7ee58eLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:dlink:dir-810l_firmware:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    5 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    0c56ce73-9b68-4a0a-a2a3-878d90a0d4ef
NVD CPE · HARDWAREdlinkdir-820lEnvironmental constraint · 1 assertions
Version not applicableCanonical identity product-77dd15fc713af02af2caf6ce98aba53e95b8082ca5eaad9d63e796c608e8e670Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:dlink:dir-820l:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    88ce60cd-dcda-43e0-80a9-257557edbc29
NVD CPE · OPERATING SYSTEMdlinkdir-820l_firmwareVulnerable target · 1 assertions
Version not applicableCanonical identity product-e4c4f4a926131189fb124e8748d03d68ecc715f25b1e7c9193d23b126544af5dLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:dlink:dir-820l_firmware:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    bc65de67-1143-4165-bce2-1ebeb2510003
NVD CPE · HARDWAREdlinkdir-820lwEnvironmental constraint · 1 assertions
Version not applicableCanonical identity product-e1174f0c1cd2f3e4e8bb865573fc8354bc561fc8467f48d45720a0e1d647c79eLinked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:dlink:dir-820lw:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    9cfe3ee8-70b8-4a1d-a449-a31b3e4897ab
NVD CPE · OPERATING SYSTEMdlinkdir-820lw_firmwareVulnerable target · 1 assertions
Version not applicableCanonical identity product-5d6227593a49a3c21764b0dd9e56e3e59a7ea2bb491a95fc98c23df19cb0fdc7Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:dlink:dir-820lw_firmware:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c5d0b0b3-29c1-4143-b1c2-d228aa9694b8
NVD CPE · HARDWAREdlinkdir-826lEnvironmental constraint · 1 assertions
Version not applicableCanonical identity product-fa46764e2e1b5a0dd0f4549bfe154466b29fce06f9573fd7fc0d26b4d386f751Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:dlink:dir-826l:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    2 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    36554d63-d4a3-499a-bd79-8c8729cb003e
NVD CPE · OPERATING SYSTEMdlinkdir-826l_firmwareVulnerable target · 1 assertions
Version not applicableCanonical identity product-f1a1f4dc6ec8473f8f49de53032d3250ff9a1076c73dc8c0b09b9f55a9272655Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:dlink:dir-826l_firmware:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    2 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    2b65a1c2-670d-49a3-91d4-b592815cc6d7
NVD CPE · HARDWAREdlinkdir-830lEnvironmental constraint · 1 assertions
Version not applicableCanonical identity product-0ac3d4860e2445dc2a31bb25a58ce16d91a9ec97d6d71f05cc1d9427b2444fbdLinked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:dlink:dir-830l:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    3 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    889685bb-efd4-46ca-bbf1-f215dad02c92
NVD CPE · OPERATING SYSTEMdlinkdir-830l_firmwareVulnerable target · 1 assertions
Version not applicableCanonical identity product-0d9a94bffe69c1b7026949998d4721987e7dc0033746a49a3c7f8d23c8ef51e1Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:dlink:dir-830l_firmware:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    3 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    e09c68c8-3ccf-43a9-ae31-011f08a93f55
NVD CPE · HARDWAREdlinkdir-836lEnvironmental constraint · 1 assertions
Version not applicableCanonical identity product-6c44c29cbcd07ecaafb1e6457aedd751e2ea117ba37a765b90230ef35063e990Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:dlink:dir-836l:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    4 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ee2ed91b-738d-448b-b7e0-d869539571f1
NVD CPE · OPERATING SYSTEMdlinkdir-836l_firmwareVulnerable target · 1 assertions
Version not applicableCanonical identity product-5e55d61ac8d56358cb92e3a98569706b3228d1af2f0e08290bb083ceadf71e6aLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:dlink:dir-836l_firmware:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    4 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    5d284e3d-970d-41a7-b7ca-b531d2be5666

Affected-product evidence

Accepted scope and product mapping

6 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-63b4eb7686e07dcd86850729591b5c1d9eee457c4dfc395dd47498ea390af81f · product-0d9a94bffe69c1b7026949998d4721987e7dc0033746a49a3c7f8d23c8ef51e1

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
ce58184a-6d65-45d8-bf5c-92b34e39104c
Mapping establishedEvidence supported

vendor-63b4eb7686e07dcd86850729591b5c1d9eee457c4dfc395dd47498ea390af81f · product-5d6227593a49a3c21764b0dd9e56e3e59a7ea2bb491a95fc98c23df19cb0fdc7

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
da8ef350-c562-41d8-907a-2596f26fef92
Mapping establishedEvidence supported

vendor-63b4eb7686e07dcd86850729591b5c1d9eee457c4dfc395dd47498ea390af81f · product-5e55d61ac8d56358cb92e3a98569706b3228d1af2f0e08290bb083ceadf71e6a

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
21864d78-0a92-4bfc-a65a-6be76bc95d93
Mapping establishedEvidence supported

vendor-63b4eb7686e07dcd86850729591b5c1d9eee457c4dfc395dd47498ea390af81f · product-95c81649557094c7570667986dbd69caf3fc7cea282c9052ca62e1338f7ee58e

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
b8eb04e2-bfe2-47fe-9b19-9a20bb39ae7f
Mapping establishedEvidence supported

vendor-63b4eb7686e07dcd86850729591b5c1d9eee457c4dfc395dd47498ea390af81f · product-e4c4f4a926131189fb124e8748d03d68ecc715f25b1e7c9193d23b126544af5d

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
dc8c4a21-3336-4d10-9715-3ddafccdacd3
Mapping establishedEvidence supported

vendor-63b4eb7686e07dcd86850729591b5c1d9eee457c4dfc395dd47498ea390af81f · product-f1a1f4dc6ec8473f8f49de53032d3250ff9a1076c73dc8c0b09b9f55a9272655

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
11947205-52fd-478c-81d3-f928907ef820
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
45b17c5b-aa91-4ac9-93ba-b288cd356f82

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
10.0
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8
CVE Program sourceCVSS 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
CISA-ADPCVSS 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

CISA-ADP

CVSS 3.1 · Secondary · Independent enrichment · rank 2

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.