Security readout for executives and security teams
Plain-English summary
This CVE can make a specific Reolink camera model reboot when it receives a specially crafted HTTP request. The business impact is availability: exposed cameras may become unreliable or temporarily unavailable. The supplied sources do not show active exploitation or identify a fixed firmware version.
Executive priority
Treat this as a high-priority availability risk for exposed security cameras. Prioritize inventory, network restriction, and vendor guidance review; broader emergency response is not supported by the supplied evidence.
Technical view
CVE-2021-44375 covers multiple CWE-20 input-validation denial-of-service flaws in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102. CVSS is 8.6 because exploitation is network-accessible, low-complexity, unauthenticated, and can cause high availability impact.
Likely exposure
Exposure is limited to Reolink RLC-410W devices running firmware v3.0.0.136_20121102, especially where HTTP access to the camera is reachable from untrusted networks.
Exploitation context
The sources say an attacker can send a specially crafted HTTP request to trigger a reboot. The CVE is not listed as KEV in the bundle, and no supplied source states active exploitation in the wild.
Researcher notes
The bundle names only Reolink RLC-410W v3.0.0.136_20121102 as affected. It does not provide a fixed version, patch status, or active-exploitation evidence. Avoid validation methods that replay crafted requests against production cameras.
Mitigation direction
- Identify Reolink RLC-410W devices and their firmware versions.
- Check Reolink and Talos guidance for fixed firmware or vendor mitigations.
- Remove camera HTTP interfaces from internet exposure.
- Restrict camera access to trusted management networks or VPNs.
- Monitor affected cameras for unexpected reboots or availability loss.
Validation and detection
- Inventory assets for Reolink RLC-410W firmware v3.0.0.136_20121102.
- Confirm camera management interfaces are not publicly reachable.
- Review uptime and monitoring data for unexplained reboot patterns.
- Verify network controls restrict HTTP access to trusted 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
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2021-44375 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.