Security readout for executives and security teams
Plain-English summary
CVE-2021-44368 can let an unauthenticated network attacker reboot an affected Reolink camera by sending a malformed HTTP request. The business impact is availability: cameras may become unreliable or unavailable during security-sensitive periods. The provided sources name Reolink RLC-410W firmware v3.0.0.136_20121102 only.
Executive priority
Treat this as a high-priority availability issue for sites that depend on affected Reolink cameras for monitoring or physical security. Prioritize exposed or business-critical cameras first. If no affected model or firmware is present, urgency drops substantially.
Technical view
The issue is improper input validation in the cgiserver.cgi JSON command parser. Talos reports the SetNetPort parameter is mishandled when it is not an object, allowing a crafted HTTP request to trigger a reboot. CVSS 3.0 is 8.6 with network attack vector, low complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is likely limited to Reolink RLC-410W devices running v3.0.0.136_20121102, especially where the HTTP management interface is reachable from untrusted networks. The provided data does not confirm other models, firmware versions, or cloud services are affected.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no source here claims active exploitation. The vulnerability is remotely reachable over the network and does not require authentication, which raises operational risk for exposed camera interfaces.
Researcher notes
Evidence is specific but narrow: Reolink RLC-410W v3.0.0.136_20121102, cgiserver.cgi JSON parsing, SetNetPort type handling, and reboot outcome. The source bundle does not provide a named patch version, broader affected-version matrix, or confirmed exploitation status.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or vendor-recommended mitigation.
- Restrict camera management interfaces to trusted admin networks or VPN access only.
- Remove affected cameras from direct internet exposure.
- Segment camera networks from business-critical systems.
- Monitor for unexpected camera reboots until remediated.
Validation and detection
- Inventory Reolink RLC-410W devices and record firmware versions.
- Identify whether cgiserver.cgi or camera HTTP management is reachable from untrusted networks.
- Review uptime, reboot history, and logs for unexplained restarts.
- Confirm remediation status against vendor guidance for the named firmware.
- Retest exposure after network restrictions or firmware updates.
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-2021-44368 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.