Security readout for executives and security teams
Plain-English summary
This issue can make a vulnerable Reolink camera reboot when it receives a malformed HTTP request. It is an availability risk, not a confidentiality or integrity issue in the provided sources. For sites relying on these cameras for monitoring, repeated reboots could create surveillance gaps.
Executive priority
Prioritize if affected cameras support physical security, safety monitoring, or regulated operations. Treat internet-exposed devices as urgent because the issue is remote, unauthenticated, and availability-impacting.
Technical view
CVE-2021-44404 is a CWE-20 input validation flaw in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102. The source describes improper handling of a GetZoomFocus parameter, allowing an unauthenticated network request to trigger device reboot.
Likely exposure
Exposure is most relevant for Reolink RLC-410W devices running firmware v3.0.0.136_20121102, especially if their HTTP management interface is reachable from untrusted networks. The provided affected metadata is incomplete.
Exploitation context
The CVE and Talos reference describe remote unauthenticated denial of service. The source bundle does not show CISA KEV listing or active exploitation evidence, so active exploitation should not be assumed.
Researcher notes
The record’s structured affected fields are not populated, but the description identifies Reolink RLC-410W v3.0.0.136_20121102. No patch version is included in the provided bundle. Avoid validation by triggering the fault on production cameras.
Mitigation direction
- Inventory Reolink RLC-410W cameras and identify firmware versions.
- Check Reolink and Talos guidance for fixed firmware or vendor mitigations.
- Remove camera HTTP interfaces from internet exposure.
- Restrict management access to trusted admin networks or VPNs.
- Monitor vulnerable devices for unexpected reboot patterns.
Validation and detection
- Confirm whether any RLC-410W devices run v3.0.0.136_20121102.
- Review firewall rules for access to camera HTTP management services.
- Check logs or monitoring for unexplained camera reboots.
- Verify vendor firmware status before declaring remediation complete.
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-2021-44404 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.