Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated network attacker force a vulnerable Reolink RLC-410W camera to reboot. The impact is service disruption, not data theft, based on the provided sources. Business urgency is highest where these cameras support monitoring, access control, safety, or incident response coverage.
Executive priority
Treat as high priority for exposed or operationally important cameras. Prioritize isolation and firmware review because the documented impact is loss of camera availability, which can affect physical security visibility.
Technical view
CVE-2021-44373 is a CWE-20 input validation issue in the cgiserver.cgi JSON command parser on Reolink RLC-410W v3.0.0.136_20121102. A malformed SetAutoFocus parameter can trigger a denial of service reboot over HTTP with no authentication, user interaction, or high attack complexity reported.
Likely exposure
Exposure is likely limited to Reolink RLC-410W devices running v3.0.0.136_20121102 with reachable HTTP management or API functionality. Risk increases materially if camera interfaces are exposed to the internet or broad internal networks.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates remote, unauthenticated, low-complexity availability impact, so opportunistic disruption is plausible where devices are reachable.
Researcher notes
Sources identify a parser input validation flaw involving SetAutoFocus not being an object. Public bundle evidence supports DoS reboot impact for one firmware build, but does not provide patch details, broader affected ranges, or confirmed exploitation.
Mitigation direction
- Inventory Reolink RLC-410W devices and firmware versions.
- Check Reolink and Talos guidance for fixed firmware or vendor mitigations.
- Remove camera HTTP management interfaces from public internet exposure.
- Restrict access to trusted admin networks or VPN paths.
- Monitor vulnerable devices for unexpected reboot patterns.
Validation and detection
- Confirm whether any RLC-410W devices run v3.0.0.136_20121102.
- Verify camera management endpoints are not internet reachable.
- Review firewall rules for broad access to camera HTTP services.
- Check device uptime and logs for unexplained reboot events.
- Track vendor advisories for remediation status.
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-2021-44373 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.