Security readout for executives and security teams
Plain-English summary
This CVE affects a named Reolink RLC-410W firmware build and can let an unauthenticated network attacker force the device to reboot through a crafted HTTP request. The direct business impact is camera downtime, not data theft, but availability loss can matter where cameras support security operations.
Executive priority
Prioritize remediation for internet-exposed or security-critical camera deployments. This is an availability risk that can disrupt monitoring coverage. If affected firmware is present, reduce network exposure while confirming whether an official firmware update or vendor mitigation exists.
Technical view
The flaw is improper input validation in cgiserver.cgi's JSON command parser. The source description states that a malformed TestWifi parameter can trigger a reboot on Reolink RLC-410W v3.0.0.136_20121102. CVSS 8.6 reflects network reachability, low complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Organizations using Reolink RLC-410W firmware v3.0.0.136_20121102 are the only exposure named in the bundle. Risk is highest if the camera HTTP interface is reachable from untrusted networks. The CVE affected-products metadata is incomplete and lists vendor/product/version as n/a.
Exploitation context
No CISA KEV listing is provided, and the bundle does not state active exploitation. The source says an attacker can send an HTTP request to trigger the vulnerability. Treat this as plausible remote denial of service where affected devices expose the vulnerable CGI endpoint.
Researcher notes
Evidence identifies CWE-20 improper input validation in the JSON parser for cgiserver.cgi. The bundle does not provide affected CPEs, patch status, or active exploitation evidence. Avoid assuming broader Reolink model impact beyond the named RLC-410W firmware build.
Mitigation direction
- Identify any Reolink RLC-410W devices running v3.0.0.136_20121102.
- Check Reolink or Talos guidance for fixed firmware or official mitigation.
- Restrict camera HTTP management access to trusted admin networks only.
- Block internet exposure for affected camera interfaces.
- Monitor affected cameras for unexpected reboot patterns.
Validation and detection
- Inventory camera models and firmware versions from asset records or device administration pages.
- Confirm whether cgiserver.cgi is reachable from untrusted networks.
- Review firewall, VPN, and segmentation rules protecting camera management interfaces.
- Check operational logs or monitoring for unexplained camera reboots.
- Document gaps where firmware status or vendor fix availability is unknown.
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-2021-44409 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.