Security readout for executives and security teams
Plain-English summary
This flaw lets a highly privileged user turn a Reolink camera network-setting field into operating-system command execution. It is serious because successful exploitation can compromise confidentiality, integrity, and availability of the device. The provided sources do not show active exploitation or a named vendor patch.
Executive priority
Treat as high-priority for any exposed or broadly administered Reolink camera fleet. The business urgency is strongest where cameras sit on sensitive networks or use shared credentials. If affected devices are isolated and tightly administered, prioritize firmware/vendor validation and access reduction.
Technical view
CVE-2021-40410 is CWE-78 OS command injection in the Reolink RLC-410W v3.0.0.136_20121102 SetLocal API. The dns1 parameter reaches dns_data->dns1 without proper validation. CVSS 3.0 is 9.1: network reachable, low complexity, high privileges required, no user interaction, changed scope, high CIA impact.
Likely exposure
Exposure is most relevant to environments running Reolink RLC-410W firmware v3.0.0.136_20121102. Risk rises if camera management or API access is reachable from untrusted networks. High privileges are required, so admin credential compromise, shared admin accounts, or insider misuse are important exposure factors.
Exploitation context
The source bundle does not identify known active exploitation, and KEV is false. Public details attribute the issue to Cisco Talos report TALOS-2021-1424. The CVSS vector indicates exploitation requires authenticated high-privilege access but can have severe device impact once achieved.
Researcher notes
The affected record fields are incomplete in the supplied bundle, listing vendor/product as n/a while the description names Reolink RLC-410W. No fix version is provided. Analysis should stay tied to TALOS-2021-1424 and CVE metadata until vendor guidance confirms remediation.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or vendor-approved mitigations.
- Restrict camera management interfaces to trusted administrative networks only.
- Remove internet exposure for affected camera administration or API services.
- Rotate and harden camera administrator credentials where exposure is possible.
- Monitor affected devices for unexpected network-setting changes.
Validation and detection
- Inventory Reolink RLC-410W devices and record firmware versions.
- Confirm whether firmware v3.0.0.136_20121102 is present.
- Review firewall rules for management/API access to affected cameras.
- Check whether privileged camera accounts are shared, stale, or weakly protected.
- Review device logs and configurations for suspicious DNS or network-setting changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-40410 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H2.36Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
9.1CriticalVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1424CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.