Security readout for executives and security teams
Plain-English summary
This issue can let an unauthenticated remote attacker make an affected Reolink RLC-410W camera reboot by sending a malformed HTTP request. The direct business impact is loss of camera availability, which can interrupt monitoring and investigations. The provided sources do not show data theft, tampering, or confirmed active exploitation.
Executive priority
Treat as high priority for sites relying on these cameras for security monitoring. The risk is operational disruption rather than disclosed compromise, but unauthenticated network-triggered reboot makes exposed devices urgent to inventory and isolate.
Technical view
CVE-2021-44372 is input validation weakness in cgiserver.cgi's JSON command parser. For Reolink RLC-410W v3.0.0.136_20121102, an invalid SetLocalLink parameter type can cause a reboot. CVSS 8.6 reflects network reachability, no authentication, and high availability impact.
Likely exposure
Exposure appears limited to deployments of Reolink RLC-410W firmware v3.0.0.136_20121102 with the HTTP management interface reachable from untrusted networks. The affected-product metadata in the bundle is incomplete, so asset inventory verification is required.
Exploitation context
The CVE record states an attacker can send an HTTP request to trigger the reboot. CISA KEV status is false, and no supplied source confirms active exploitation. The bundle does not provide exploit prevalence or public scanning evidence.
Researcher notes
Source detail is narrow: Talos and CVE describe a parser flaw involving SetLocalLink type handling in cgiserver.cgi. The bundle does not include complete CPE data, patch status, or mitigation specifics, so avoid broad product claims without vendor confirmation.
Mitigation direction
- Inventory Reolink camera models and firmware versions.
- Check Reolink and Talos guidance for available firmware updates or workarounds.
- Restrict camera HTTP management access to trusted administrative networks only.
- Block direct internet exposure for affected camera interfaces.
- Monitor affected cameras for unexpected reboot or availability events.
Validation and detection
- Confirm whether any RLC-410W devices run v3.0.0.136_20121102.
- Review firewall and NAT rules for exposed camera HTTP interfaces.
- Verify management access requires trusted network paths.
- Check monitoring history for unexplained camera reboots.
- Document compensating controls if vendor fixes are unavailable.
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-2021-44372 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.