Security readout for executives and security teams
Plain-English summary
This CVE can let an unauthenticated network attacker cause a vulnerable Reolink camera to reboot. The business risk is loss of camera availability, which can disrupt monitoring and physical security coverage. The provided sources do not confirm active exploitation or name a fixed firmware version.
Executive priority
Treat this as high priority for environments relying on these cameras for security, safety, or evidence collection. The main impact is availability loss, not data theft, but repeated reboots could undermine monitoring coverage.
Technical view
CVE-2021-44395 is a CWE-20 input validation flaw in the cgiserver.cgi JSON command parser. The CVE description identifies Reolink RLC-410W v3.0.0.136_20121102 and says malformed handling of the GetMask parameter can trigger a reboot through an HTTP request.
Likely exposure
Exposure is most likely where the identified Reolink RLC-410W firmware is reachable from untrusted networks or the internet. The CVE affected-product metadata is incomplete, so inventory confirmation is important.
Exploitation context
The source bundle states an attacker can trigger the issue with an HTTP request, and the CVSS vector is network, low complexity, no privileges, no user interaction. KEV is false, and no cited source here confirms active exploitation.
Researcher notes
Evidence is specific on parser location, impact, and CVSS, but incomplete on vendor remediation and structured affected CPEs. The CVE record’s affected fields are n/a while the description names a Reolink model and firmware.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or official workarounds.
- Remove direct internet access to affected camera management interfaces.
- Restrict camera access to trusted management networks or VPNs.
- Monitor for unexpected camera reboots and availability gaps.
- Prioritize firmware update or replacement where vendor fixes are unavailable.
Validation and detection
- Inventory Reolink RLC-410W devices and firmware versions.
- Identify whether camera HTTP interfaces are reachable from untrusted networks.
- Review monitoring records for unexplained reboots or service interruptions.
- Confirm firewall rules limit access to approved management hosts.
- Document any devices matching v3.0.0.136_20121102 for remediation tracking.
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
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ATT&CK lookup starting points
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-44395 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.