Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated network attacker force a vulnerable Reolink camera to reboot. The business impact is loss of camera availability, not data theft, but repeated reboots could disrupt surveillance or site monitoring.
Executive priority
Treat this as a high-priority availability risk for surveillance environments. Urgency rises if affected cameras protect sensitive facilities, safety workflows, or are reachable from untrusted networks.
Technical view
CVE-2021-44406 is a CWE-20 input-validation flaw in the cgiserver.cgi JSON command parser for Reolink RLC-410W v3.0.0.136_20121102. The source states a malformed GetAutoFocus parameter can trigger a reboot via HTTP. CVSS is 8.6, driven by network reachability, no privileges, and high availability impact.
Likely exposure
Exposure is most likely where the named Reolink RLC-410W firmware is reachable over a network, especially from untrusted networks. The supplied affected-product metadata is incomplete, so validate against actual camera model and firmware inventory.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. It does state an attacker can send an HTTP request to trigger the denial of service, with no authentication requirement reflected in the CVSS vector.
Researcher notes
Evidence is narrow: the description names Reolink RLC-410W v3.0.0.136_20121102, while structured affected metadata is not populated. Do not generalize to other models without vendor or researcher confirmation.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or vendor mitigations.
- Remove camera management interfaces from direct internet exposure.
- Restrict access to trusted management networks or VPN paths.
- Monitor affected cameras for unexpected reboot patterns.
- Prioritize firmware review for the named RLC-410W version.
Validation and detection
- Inventory Reolink camera models and firmware versions.
- Identify whether RLC-410W v3.0.0.136_20121102 is present.
- Review firewall rules for exposed HTTP camera interfaces.
- Check device logs or uptime for unexplained reboots.
- Confirm vendor guidance before applying firmware 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-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-44406 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
- High
- CVSS
- 8.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/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:N/UI:N/S:C/C:N/I:N/A:H3.94Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.6HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1421CVE 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.