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CVE-2021-40407 (GCVE-0-2021-40407)

Vulnerability from cvelistv5 – Published: 2022-01-28 19:10 – Updated: 2025-10-21 23:15
VLAI CISA Previdian
Summary
An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [1] or [2], based on DDNS type, the ddns->domain variable, that has the value of the domain parameter provided through the SetDdns API, is not validated properly. This would lead to an OS command injection. An attacker can send an HTTP request to trigger this vulnerability.
Severity
9.1 (Critical)
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-21 04:56 UTC
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: bd638867-63b2-41c2-b607-cbcf70114782

Vulnerability ID: CVE-2021-40407

Status: Confirmed

Status Updated: 2024-12-18 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2024-12-18
Asserted: 2024-12-18
Scope
Notes: KEV entry: Reolink RLC-410W IP Camera OS Command Injection Vulnerability | Affected: Reolink / RLC-410W IP Camera | Description: Reolink RLC-410W IP cameras contain an authenticated OS command injection vulnerability in the device network settings functionality. | Required action: The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization if a current mitigation is unavailable. | Due date: 2025-01-08 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://reolink.com/product-eol/ ; https://reolink.com/download-center/ ; https://nvd.nist.gov/vuln/detail/CVE-2021-40407
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-78
Feed CISA Known Exploited Vulnerabilities Catalog
Product RLC-410W IP Camera
Due Date 2025-01-08
Date Added 2024-12-18
Vendorproject Reolink
Vulnerabilityname Reolink RLC-410W IP Camera OS Command Injection Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 13:24 UTC | Updated: 2026-02-06 07:53 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 7f8c1094-492f-4f95-97c7-13f28fa00d26

Vulnerability ID: CVE-2021-40407

Status: Confirmed

Status Updated: 2024-12-18 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2024-12-18
Asserted: 2024-12-18
Scope
Notes: KEVIntel entry: An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [1] or [2],... | Affected: reolink / RLC-410W | CVSS: 9.1 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [1] or [2],...
Vendor reolink
Product RLC-410W
Added Date 2024-12-18T00:00:00.000Z
Cvss Score 9.1
Epss Score None
Cvss Severity CRITICAL
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 11:14 UTC | Updated: 2026-06-23 11:14 UTC
Show details on NVD website
To clipboard 

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              "description_data": [
                {
                  "lang": "eng",
                  "value": "An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [1] or [2], based on DDNS type, the ddns-\u003edomain variable, that has the value of the domain parameter provided through the SetDdns API, is not validated properly. This would lead to an OS command injection. An attacker can send an HTTP request to trigger this vulnerability."
                }
              ]
            },
            "impact": {
              "cvss": {
                "baseScore": 9.1,
                "baseSeverity": "Critical",
                "vectorString": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.0"
              }
            },
            "problemtype": {
              "problemtype_data": [
                {
                  "description": [
                    {
                      "lang": "eng",
                      "value": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
                    }
                  ]
                }
              ]
            },
            "references": {
              "reference_data": [
                {
                  "name": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1424",
                  "refsource": "MISC",
                  "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1424"
                }
              ]
            }
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
        "assignerShortName": "talos",
        "cveId": "CVE-2021-40407",
        "datePublished": "2022-01-28T19:10:13.000Z",
        "dateReserved": "2021-09-01T00:00:00.000Z",
        "dateUpdated": "2025-10-21T23:15:48.390Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.