Security readout for executives and security teams
Plain-English summary
This flaw can let a remote, unauthenticated attacker crash and reboot a vulnerable Reolink RLC-410W camera. The main business impact is loss of camera availability, not data theft or tampering based on the supplied sources.
Executive priority
Treat this as a high-priority availability risk for sites relying on affected cameras for security monitoring. Prioritize exposed or business-critical cameras first, then apply vendor guidance and network restrictions.
Technical view
CVE-2021-44389 is a CWE-20 input validation issue in the cgiserver.cgi JSON command parser for Reolink RLC-410W v3.0.0.136_20121102. A malformed GetAbility parameter can trigger a device reboot. CVSS is 8.6 because the attack is network-reachable, low complexity, unauthenticated, and availability-impacting.
Likely exposure
Exposure is most likely where Reolink RLC-410W cameras running v3.0.0.136_20121102 are reachable over a network, especially if management or CGI interfaces are exposed beyond trusted networks.
Exploitation context
The supplied bundle does not show CISA KEV listing or cited active exploitation. Talos describes a specially crafted HTTP request as sufficient to trigger reboot, but the sources provided do not establish exploitation in the wild.
Researcher notes
The CVE record’s structured affected fields are listed as n/a, while the description names Reolink RLC-410W v3.0.0.136_20121102. Patch details are not present in the supplied bundle, so remediation should be confirmed against vendor guidance.
Mitigation direction
- Check Reolink and Talos guidance for firmware updates or vendor-recommended remediation.
- Update affected RLC-410W devices if a fixed firmware is available from Reolink.
- Remove camera administrative interfaces from direct internet exposure.
- Limit access to trusted networks, VPNs, or management jump hosts.
- Monitor affected cameras for unexpected reboot patterns or availability loss.
Validation and detection
- Inventory Reolink RLC-410W cameras and record firmware versions.
- Confirm whether v3.0.0.136_20121102 exists in production or remote sites.
- Check whether camera CGI or management interfaces are externally reachable.
- Review device uptime, logs, and monitoring for unexplained reboot events.
- Verify network controls restrict access to approved management sources.
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-2021-44389 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.