Security readout for executives and security teams
Plain-English summary
This flaw can let an attacker force a vulnerable Reolink camera to reboot by sending a specially crafted HTTP request. The known impact is loss of availability, not data theft or tampering. It matters most where cameras support physical security, operations, or are reachable from untrusted networks.
Executive priority
Prioritize remediation as high where affected cameras are internet-accessible or support critical security monitoring. The business risk is availability loss: disrupted video coverage and operational blind spots. For well-segmented cameras, urgency is lower but still requires firmware and exposure review.
Technical view
The vulnerability is in the cgiserver.cgi JSON command parser for Reolink RLC-410W v3.0.0.136_20121102. Improper input validation of the SetIrLights parameter when it is not an object can trigger a reboot. CVSS 3.0 is 8.6: network reachable, low complexity, no privileges, no user interaction, availability high.
Likely exposure
Exposure is likely where Reolink RLC-410W devices with firmware v3.0.0.136_20121102 expose the HTTP management surface. Internet-facing cameras or cameras reachable from guest, IoT, or compromised networks are highest risk. The bundle lists affected vendor/product metadata as n/a, so scope beyond the named model and version is not established.
Exploitation context
The sources state an attacker can send an HTTP request to trigger the reboot condition. The CVSS vector indicates no privileges or user interaction are required. The provided bundle says KEV is false, and it does not cite active exploitation in the wild.
Researcher notes
Evidence is limited to the named Reolink RLC-410W firmware version and Talos/CVE descriptions. The affected CPE fields are not populated in the bundle. Do not assume other Reolink models or versions are affected without vendor or researcher confirmation.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or vendor-recommended mitigation.
- Restrict camera HTTP management access to trusted administration networks only.
- Remove exposed camera interfaces from the public internet.
- Use firewall rules, VLANs, or VPN access for camera management paths.
- Monitor vulnerable cameras for repeated unexpected reboots.
- Replace or isolate devices if no supported fix is available.
Validation and detection
- Inventory Reolink RLC-410W devices and record firmware versions.
- Identify whether cgiserver.cgi or HTTP management is reachable from untrusted networks.
- Confirm vulnerable devices are not internet-exposed.
- Review uptime and logs for unexplained reboot patterns.
- Verify network controls limit management access to approved administrators.
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-2021-44382 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.