Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated network attacker reboot an affected Reolink RLC-410W camera by sending a specially crafted HTTP request. The business impact is availability loss: cameras may go offline unexpectedly, reducing monitoring coverage and creating operational disruption.
Executive priority
Prioritize if affected cameras support physical security, compliance monitoring, or safety operations. Treat internet-exposed devices as urgent. Internal-only devices still warrant remediation because disruption can blind monitoring coverage during an incident.
Technical view
CVE-2021-44378 is a CWE-20 input validation issue in the cgiserver.cgi JSON command parser. The cited description identifies Reolink RLC-410W v3.0.0.136_20121102 and says a malformed SetEnc parameter that is not an object can trigger a reboot. CVSS 3.0 is 8.6, network reachable, no privileges, no user interaction, availability impact high.
Likely exposure
Exposure is most likely where affected Reolink RLC-410W cameras or their web interfaces are reachable from untrusted networks. The source bundle does not provide CPEs or a full affected-version range, so asset confirmation is required.
Exploitation context
The bundle supports remote, unauthenticated denial of service, but it does not cite active exploitation. CISA KEV status is false in the provided data. No confidentiality or integrity impact is indicated by the CVSS vector.
Researcher notes
Evidence is specific but incomplete. The source names a product and firmware build, but the CVE affected-product metadata is n/a and no patch details are included in the bundle. Avoid assuming broader Reolink impact without vendor confirmation.
Mitigation direction
- Identify any Reolink RLC-410W cameras and record firmware versions.
- Check Reolink and Talos guidance for affected firmware and available updates.
- Remove camera web interfaces from direct internet exposure.
- Restrict management access to trusted administration networks or VPNs.
- Segment surveillance devices from business-critical networks.
- Monitor for unexpected camera reboots or repeated management-interface requests.
Validation and detection
- Confirm whether any deployed camera matches RLC-410W v3.0.0.136_20121102.
- Review exposure paths to cgiserver.cgi from untrusted networks.
- Check firewall, VPN, and network segmentation rules for camera management access.
- Review device uptime and logs for unexplained reboot patterns.
- Verify remediation against vendor guidance without using disruptive request testing.
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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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-44378 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.