Security readout for executives and security teams
Plain-English summary
A Reolink RLC-410W camera firmware issue can let a remote attacker crash and reboot the device with a malformed HTTP request. The business impact is service interruption for exposed cameras, not data theft based on the provided sources.
Executive priority
Prioritize remediation for exposed or operationally important cameras. The issue is availability-focused, but unauthenticated remote reboot risk can disrupt physical monitoring and incident response visibility.
Technical view
CVE-2021-44377 is improper input validation in the cgiserver.cgi JSON command parser. Sources describe SetImage receiving a non-object parameter, causing reboot. CVSS 8.6 reflects unauthenticated network reachability and high availability impact, with no confidentiality or integrity impact stated.
Likely exposure
Evidence specifically names Reolink RLC-410W v3.0.0.136_20121102. Exposure is most likely where the camera HTTP interface is reachable from untrusted networks. The source bundle’s affected CPE data is incomplete.
Exploitation context
The bundle states an attacker can trigger the issue with an HTTP request, but CISA KEV is false and no cited source confirms active exploitation. Treat this as a plausible remote denial-of-service risk, not confirmed in-the-wild exploitation.
Researcher notes
The affected-products metadata is weak, but the description names one Reolink model and firmware. Do not broaden scope without vendor confirmation. No patch version is provided in the source bundle.
Mitigation direction
- Inventory Reolink RLC-410W devices and record firmware versions.
- Check Reolink and Talos guidance for fixed firmware or vendor mitigations.
- Restrict camera HTTP access to trusted management networks only.
- Remove direct internet exposure for affected camera interfaces.
- Monitor affected devices for unexpected reboots or availability loss.
Validation and detection
- Confirm whether any RLC-410W runs firmware v3.0.0.136_20121102.
- Verify camera web interfaces are not reachable from the internet.
- Review firewall, VPN, and network segmentation controls for camera access.
- Check logs or monitoring for repeated camera reboot events.
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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Open ATT&CK lookupCVE-2021-44377 mapping review
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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.