Security readout for executives and security teams
Plain-English summary
CVE-2021-44367 can cause a vulnerable Reolink RLC-410W camera to reboot when it receives a specially crafted HTTP request. The main business impact is loss of camera availability, which may affect physical monitoring, incident response, or site operations.
Executive priority
High priority where affected cameras support security, safety, or regulated monitoring. The issue is primarily operational: outages may create blind spots even without evidence of data theft or system takeover.
Technical view
The source describes improper input validation in the cgiserver.cgi JSON command parser for Reolink RLC-410W firmware v3.0.0.136_20121102. A malformed SetUpnp parameter can trigger denial of service. CVSS 8.6 reflects network access, low complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is likely limited to Reolink RLC-410W cameras running firmware v3.0.0.136_20121102, especially where the HTTP management interface is reachable from untrusted networks. The CVE metadata affected-product fields are incomplete, so confirm against device inventory and vendor records.
Exploitation context
The provided sources do not state active exploitation, and this CVE is not marked KEV. The described attack path is remote HTTP access to the camera interface and results in reboot rather than confidentiality or integrity compromise.
Researcher notes
The evidence names a specific model and firmware in the description, but the structured affected fields are n/a. Treat product scope as source-limited unless vendor advisories expand it. No patch version or exploitation-in-the-wild claim is present in the provided bundle.
Mitigation direction
- Check Reolink or Talos guidance for fixed firmware; sources do not name a patched version.
- Remove camera management interfaces from internet-facing exposure.
- Restrict HTTP management access to trusted administrative networks.
- Segment surveillance devices from general user and guest networks.
- Plan replacement if affected firmware is unsupported or cannot be updated.
Validation and detection
- Inventory Reolink RLC-410W cameras and record firmware versions.
- Confirm whether firmware v3.0.0.136_20121102 is present.
- Map which cameras expose HTTP management interfaces to untrusted networks.
- Review monitoring for unexplained camera reboots or availability gaps.
- Do not validate by sending malformed reboot-triggering requests in production.
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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Open ATT&CK lookupCVE-2021-44367 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.