Security readout for executives and security teams
Plain-English summary
This CVE affects a Reolink RLC-410W camera firmware build and can let a remote attacker force the device to reboot. The direct business impact is loss of camera availability, which matters most where video coverage supports physical security, monitoring, or operations.
Executive priority
Treat this as high priority for environments where camera uptime is operationally important or internet exposure exists. The likely impact is service disruption, not confirmed compromise, but unauthenticated remote reboot risk can degrade monitoring and incident response capability.
Technical view
The issue is improper input validation in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102. A specially crafted HTTP request with an invalid GetPtzTattern parameter type can trigger a reboot. CVSS indicates network access, low complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is most likely where the affected Reolink RLC-410W firmware is reachable over a network, especially from untrusted networks. The CVE affected-product metadata is incomplete, so asset validation should rely on device model, firmware version, and vendor or Talos details.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is remotely reachable according to CVSS and the CVE description, but sources only support denial of service through device reboot, not code execution or data theft.
Researcher notes
The public record centers on CWE-20 improper input validation in a JSON command parser. The CVE description names GetPtzTattern type handling and a reboot outcome. Avoid assuming broader Reolink product impact because the structured affected field is listed as n/a in the provided bundle.
Mitigation direction
- Identify Reolink RLC-410W devices and confirm firmware versions.
- Check Reolink and Talos guidance for fixed firmware or vendor remediation.
- Remove affected camera interfaces from public internet exposure.
- Restrict camera access to trusted management networks or VPN only.
- Monitor affected cameras for unexpected reboot patterns.
Validation and detection
- Inventory camera model and firmware from trusted asset records or management interfaces.
- Review firewall and exposure data for untrusted access to camera web services.
- Check logs or monitoring for unexplained camera reboots.
- Confirm whether vendor guidance names a fixed firmware version.
- Document any uncertainty caused by incomplete CVE affected-product metadata.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-44403 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.