Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated remote attacker crash and reboot a specific Reolink camera model by sending a malformed HTTP request. The business impact is availability: affected cameras could be repeatedly knocked offline, reducing monitoring coverage during security or operational events.
Executive priority
Treat this as a high-priority availability risk for exposed cameras. Prioritize internet-facing or security-critical camera deployments first, especially where camera downtime affects physical security, safety monitoring, or incident response visibility.
Technical view
CVE-2021-44363 is improper input validation in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102. The supplied description says a specially crafted HTTP request where SetPush is not an object can trigger a reboot. CVSS 3.0 is 8.6, network reachable, low complexity, no privileges, no user interaction.
Likely exposure
Exposure is most likely where Reolink RLC-410W cameras on firmware v3.0.0.136_20121102 have their HTTP management/API service reachable from untrusted networks. The supplied affected product metadata is incomplete, so confirm model and firmware directly from inventory.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The Talos reference and CVE description indicate the condition is remotely triggerable over HTTP and affects availability by rebooting the device.
Researcher notes
Evidence points to CWE-20 input validation failure in JSON parsing, specifically a SetPush type handling issue. Supplied metadata lacks structured CPEs and does not name a patch. Avoid assuming broader Reolink model exposure without vendor or Talos confirmation.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or vendor mitigations.
- Restrict camera HTTP management access to trusted administrative networks.
- Remove direct internet exposure for affected camera interfaces.
- Monitor affected cameras for unexpected reboots until remediated.
Validation and detection
- Inventory Reolink RLC-410W cameras and record firmware versions.
- Identify devices running v3.0.0.136_20121102.
- Confirm whether cgiserver.cgi or camera HTTP management is reachable from untrusted networks.
- Review logs and uptime data for unexplained reboot patterns.
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
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ATT&CK lookup starting points
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-44363 mapping review
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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.