Security readout for executives and security teams
Plain-English summary
This CVE affects a specific Reolink RLC-410W camera firmware. A remote, unauthenticated HTTP request can make the camera reboot, causing availability loss. It is a high-priority operational risk for exposed cameras, especially where camera uptime supports security monitoring.
Executive priority
Treat this as urgent for exposed cameras and important for internal-only deployments. The business impact is service disruption, not data theft, based on the provided CVSS and description.
Technical view
The issue is improper input handling in the cgiserver.cgi JSON command parser on Reolink RLC-410W v3.0.0.136_20121102. The CVSS vector shows network reachability, low complexity, no privileges, no user interaction, changed scope, and high availability impact only.
Likely exposure
Exposure is most likely where affected Reolink RLC-410W cameras are reachable from the internet, guest networks, or other untrusted segments.
Exploitation context
The sources state an attacker can send a specially crafted HTTP request to trigger a reboot. The source bundle does not indicate CISA KEV listing or active exploitation evidence.
Researcher notes
Do not broaden scope beyond Reolink RLC-410W v3.0.0.136_20121102 from the provided sources. Evidence supports unauthenticated network-triggered denial of service via JSON command parsing, but no patch details were included.
Mitigation direction
- Check Reolink guidance for updated firmware or vendor-recommended remediation.
- Remove affected camera management interfaces from internet exposure.
- Restrict camera access to trusted management networks or VPN users.
- Segment cameras away from guest and general user networks.
- Monitor camera reboot events and availability alerts.
Validation and detection
- Inventory Reolink RLC-410W devices and confirm firmware versions.
- Identify devices running v3.0.0.136_20121102.
- Review firewall and NAT rules for exposed camera HTTP access.
- Check uptime, reboot, and monitoring logs for unexpected restarts.
- Document whether vendor firmware or compensating controls are applied.
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
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Open ATT&CK lookupCVE-2021-44394 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.