Security readout for executives and security teams
Plain-English summary
This issue can let an unauthenticated network attacker reboot an affected Reolink camera with a crafted HTTP request. The documented impact is availability loss, not data theft or code execution. Business urgency is highest where cameras support physical security, safety monitoring, or operations continuity.
Executive priority
Prioritize remediation where affected cameras protect facilities, safety operations, or regulated environments. This is an availability vulnerability: it can disrupt monitoring without needing credentials. If affected devices are internet-exposed, treat isolation or access restriction as urgent while confirming vendor firmware status.
Technical view
CVE-2021-44411 is an input-validation flaw in the cgiserver.cgi JSON command parser for Reolink RLC-410W v3.0.0.136_20121102. The parser mishandles a non-object search parameter, and a crafted HTTP request can trigger a device reboot. CVSS is 8.6, network-accessible, low complexity, no privileges, no user interaction.
Likely exposure
Exposure is most likely on Reolink RLC-410W cameras running firmware v3.0.0.136_20121102 where the camera web/API service is reachable from untrusted networks. The CVE metadata does not provide broader product or version ranges, so assume only the named model and firmware unless vendor guidance says otherwise.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is publicly documented by Cisco Talos, and the CVSS vector indicates remote, unauthenticated, low-complexity triggering. Treat public or broadly reachable camera interfaces as higher risk.
Researcher notes
Evidence is specific to Reolink RLC-410W v3.0.0.136_20121102 and CWE-20. The CVE record lists generic affected fields as n/a, so do not expand scope without vendor confirmation. No source in the bundle names a patch, workaround, or active exploitation.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or official mitigation.
- Remove public internet exposure for affected camera web/API interfaces.
- Restrict management access to trusted VPN or administrative networks only.
- Prioritize replacement or isolation if no supported firmware fix exists.
- Monitor affected cameras for unexpected reboots or availability loss.
Validation and detection
- Inventory Reolink RLC-410W cameras and record firmware versions.
- Identify any devices running v3.0.0.136_20121102.
- Confirm whether cgiserver.cgi or the web interface is reachable externally.
- Review firewall, VPN, and management-network restrictions for camera access.
- Check uptime and monitoring data for unexplained reboot patterns.
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-2021-44411 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.