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PatchSiren cyber security CVE debrief

CVE-2021-40407 Reolink CVE debrief

CVE-2021-40407 affects the Reolink RLC-410W IP Camera and is described as an OS command injection vulnerability. CISA added it to the Known Exploited Vulnerabilities catalog on 2024-12-18, which means the issue is considered actively exploited in the wild by the authority that maintains the KEV list. CISA’s note also warns that the impacted product may be end-of-life or end-of-service, and recommends discontinuing use if no current mitigation is available.

Vendor
Reolink
Product
RLC-410W IP Camera
CVSS
CRITICAL 9.1
CISA KEV
Listed
Original CVE published
2024-12-18
Original CVE updated
2024-12-18
Advisory published
2024-12-18
Advisory updated
2024-12-18

Who should care

Organizations, IT and security teams, and individual operators that still manage or rely on Reolink RLC-410W IP Cameras. This is especially important for asset owners responsible for embedded or IoT devices that may be difficult to patch or replace.

Technical summary

The supplied corpus identifies CVE-2021-40407 as an OS command injection issue in the Reolink RLC-410W IP Camera. The main defensive significance comes from CISA’s KEV listing, which indicates known exploitation. The source notes also indicate the product may be end-of-life or end-of-service, so remediation may depend on whether Reolink still provides a supported firmware or mitigation path.

Defensive priority

High. Treat as urgent for any deployed RLC-410W devices, because CISA has placed the CVE in the KEV catalog. If the device is end-of-life/end-of-service and no current mitigation exists, retirement or replacement should be prioritized.

Recommended defensive actions

  • Inventory all Reolink RLC-410W IP Cameras and determine where they are deployed.
  • Check the vendor’s support and download resources for any available firmware update or mitigation path.
  • Verify whether the product is end-of-life or end-of-service before relying on patching as a long-term fix.
  • If no current mitigation is available, discontinue use and plan replacement in line with CISA’s guidance.
  • Reduce exposure of any remaining devices by limiting who can reach them and segmenting them from critical networks.
  • Monitor affected environments for unusual device behavior and unexpected configuration changes until remediation is complete.

Evidence notes

Source corpus references CISA’s Known Exploited Vulnerabilities feed entry for CVE-2021-40407, with dateAdded 2024-12-18 and dueDate 2025-01-08. The supplied metadata states the vulnerability name as “Reolink RLC-410W IP Camera OS Command Injection Vulnerability” and includes CISA’s note that the product could be end-of-life or end-of-service. Official reference links provided in the corpus include the CVE record, the NVD detail page, and the CISA KEV catalog entry. No CVSS score was supplied in the corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-40407 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-40407

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-40407 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-40407

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.