Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated remote attacker crash and reboot a vulnerable Reolink RLC-410W camera by sending a malformed HTTP request. The main business risk is loss of camera availability, which can interrupt monitoring or investigations. The supplied sources do not show data theft, command execution, or confirmed active exploitation.
Executive priority
Treat as high priority for exposed or operationally important cameras. It is primarily an availability risk, but camera outages can create physical security blind spots. Prioritize inventory, exposure reduction, and vendor firmware review.
Technical view
CVE-2021-44359 is a CWE-20 input validation issue in Reolink RLC-410W firmware v3.0.0.136_20121102. Talos reports the cgiserver.cgi JSON command parser mishandles a malformed SetCrop parameter, causing a device reboot. CVSS is 8.6 because exploitation 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 have reachable HTTP management or API access. Internet-exposed cameras, flat internal networks, and security monitoring environments have higher operational risk.
Exploitation context
The provided CVE data says an attacker can trigger the vulnerability with an HTTP request. CISA KEV status is false, and the supplied sources do not provide evidence of active exploitation in the wild.
Researcher notes
The affected field in the CVE record is incomplete, but the description names Reolink RLC-410W v3.0.0.136_20121102. Sources do not name a patch level. Avoid assuming broader Reolink impact without vendor confirmation.
Mitigation direction
- Identify Reolink RLC-410W cameras and record firmware versions.
- Check Reolink or Talos guidance for fixed firmware or vendor mitigation.
- Restrict camera HTTP management access to trusted administrative networks.
- Block internet access to camera management interfaces.
- Segment camera networks from user and server networks.
- Monitor for unexpected camera reboots or availability loss.
Validation and detection
- Confirm whether any RLC-410W runs firmware v3.0.0.136_20121102.
- Verify camera management interfaces are not publicly reachable.
- Review network exposure for cgiserver.cgi access paths.
- Check device logs or monitoring for repeated unexplained reboots.
- Confirm firewall rules limit access to authorized administrators.
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
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Open ATT&CK lookupCVE-2021-44359 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.