Security readout for executives and security teams
Plain-English summary
This flaw can let an attacker remotely force a vulnerable Reolink RLC-410W camera to reboot by sending malformed HTTP input. The business impact is availability: cameras may drop offline at important times. The provided sources identify one firmware version and do not prove active exploitation.
Executive priority
Treat this as a high-priority availability risk for environments relying on affected cameras for monitoring, safety, or evidence capture. Urgency increases if camera management is reachable from untrusted networks.
Technical view
CVE-2021-44371 is a CWE-20 input validation issue in cgiserver.cgi JSON command parsing. In Reolink RLC-410W v3.0.0.136_20121102, an invalid SetEmail parameter can trigger a denial of service reboot. CVSS 8.6 reflects network reachability, low complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Likely exposure is limited to Reolink RLC-410W devices running v3.0.0.136_20121102 with HTTP access to cgiserver.cgi reachable by an attacker. The structured CVE affected-product fields are incomplete, so do not assume other models without vendor or researcher evidence.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. It does describe a specially crafted HTTP request causing reboot, and the CVSS vector indicates remote unauthenticated exploitation is possible.
Researcher notes
The CVE data names RLC-410W v3.0.0.136_20121102 in the description, but affected CPE fields are not populated. Keep scope narrow unless Talos or Reolink documentation expands affected versions. Avoid validation using crafted malformed requests in production.
Mitigation direction
- Check Reolink vendor guidance and firmware notes for a fixed release.
- Remove camera management HTTP interfaces from direct internet exposure.
- Restrict camera access to trusted management networks or VPN paths.
- Prioritize replacement or isolation if no vendor-supported firmware is available.
- Monitor vulnerable cameras for unexpected reboots or availability gaps.
Validation and detection
- Inventory Reolink RLC-410W devices and record firmware versions.
- Confirm whether any device runs v3.0.0.136_20121102.
- Verify management HTTP exposure from network inventory, not by attack testing.
- Review logs or monitoring for repeated reboot or offline events.
- Compare firmware status against current Reolink vendor guidance.
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-2021-44371 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.