Security readout for executives and security teams
Plain-English summary
CVE-2021-44362 can let an unauthenticated remote attacker reboot an affected Reolink RLC-410W camera by abusing JSON parsing in cgiserver.cgi. The business impact is loss of camera availability, which can disrupt monitoring, evidence collection, and physical security coverage.
Executive priority
Prioritize remediation for cameras supporting security operations, exposed sites, or locations relying on continuous video coverage. The vulnerability is availability-focused, not described as data theft, but camera outages can create meaningful physical security risk.
Technical view
The issue is improper input validation in the cgiserver.cgi JSON command parser for Reolink RLC-410W v3.0.0.136_20121102. The CVE describes SetCloudSchedule handling where a parameter is not an object. A specially crafted HTTP request can trigger a reboot. CVSS is 8.6: network reachable, low complexity, no privileges, availability impact high.
Likely exposure
Exposure is most relevant where affected Reolink RLC-410W cameras expose their HTTP management or CGI interface to untrusted networks, including the internet, guest networks, or shared internal segments. Source affected-product metadata is incomplete, but the CVE description names one camera model and firmware version.
Exploitation context
The CVE and Talos reference describe remote triggering by HTTP request, but the source bundle does not state active exploitation. CISA KEV status is false in the provided data. Treat internet-exposed devices as higher priority because no authentication is required according to the CVSS vector.
Researcher notes
Evidence supports CWE-20 improper input validation and unauthenticated network denial of service against a named firmware build. The bundle does not provide patch version, workaround specifics, proof of active exploitation, or broad affected-version ranges. Avoid assuming other Reolink models are affected without vendor or researcher confirmation.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or vendor-supported mitigations.
- Remove camera management interfaces from direct internet exposure.
- Restrict HTTP access to trusted admin networks or VPN only.
- Use firewall rules to block untrusted access to cgiserver.cgi.
- Monitor affected cameras for unexpected reboots or availability loss.
- Replace or isolate devices if no supported firmware update exists.
Validation and detection
- Inventory Reolink RLC-410W cameras and record firmware versions.
- Identify whether v3.0.0.136_20121102 is present.
- Confirm management HTTP interfaces are not reachable from untrusted networks.
- Review uptime, device logs, and monitoring for unexplained reboot patterns.
- Verify segmentation blocks non-admin systems from camera management paths.
- Track vendor advisories for remediation status.
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
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-44362 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.