Security readout for executives and security teams
Plain-English summary
This CVE describes a remote denial-of-service issue in a Reolink RLC-410W camera firmware. An unauthenticated network request to the camera’s CGI JSON parser can cause the device to reboot, interrupting video availability and monitoring coverage.
Executive priority
Treat this as a high-priority availability risk for security camera operations, especially if devices are remotely reachable. The main business impact is loss of surveillance availability through forced reboot, not data theft or integrity compromise based on the provided sources.
Technical view
CVE-2021-44374 affects cgiserver.cgi JSON command parsing in Reolink RLC-410W v3.0.0.136_20121102. The reported flaw is improper input validation: a SetMask parameter is not an object, and a crafted HTTP request can trigger a reboot. CVSS is 8.6 with network, low-complexity, no-authentication conditions.
Likely exposure
Exposure is most relevant where affected Reolink RLC-410W cameras have reachable HTTP management or CGI interfaces. The source bundle provides no CPEs and no broader affected-version list, so scope should be verified against actual camera model and firmware inventories.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. It does state that an attacker can send an HTTP request to trigger the vulnerability, so internet-exposed or flat-network cameras would carry higher operational risk.
Researcher notes
The public bundle attributes the issue to CWE-20 and Talos report TALOS-2021-1421. Evidence names one firmware build and parser behavior, but does not provide CPE coverage, patch details, or confirmed exploitation. Avoid assuming other Reolink models are affected without vendor confirmation.
Mitigation direction
- Inventory Reolink RLC-410W cameras and record exact firmware versions.
- Check Reolink and Talos guidance for firmware updates or official mitigations.
- Remove camera management interfaces from direct internet exposure.
- Restrict access to trusted administration networks or VPN paths.
- Segment camera networks from business-critical systems.
- Monitor affected cameras for unexpected reboot or availability events.
Validation and detection
- Confirm whether any RLC-410W device runs v3.0.0.136_20121102.
- Identify whether cgiserver.cgi or HTTP management is reachable from untrusted networks.
- Review device uptime, logs, or monitoring for unexplained reboot patterns.
- Verify firewall rules limit access to camera administration interfaces.
- Document any compensating controls where firmware status remains unknown.
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
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCVE-2021-44374 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.