Security readout for executives and security teams
Plain-English summary
This vulnerability can let an unauthenticated network attacker force a Reolink RLC-410W camera to reboot by sending a crafted HTTP request. The business impact is availability loss: cameras may be knocked offline, disrupting monitoring and incident response.
Executive priority
Treat this as a high-priority availability risk for exposed security cameras. Prioritize devices reachable from the internet or shared networks because disruption can directly reduce physical security visibility.
Technical view
CVE-2021-44354 affects the cgiserver.cgi JSON command parser in Reolink RLC-410W firmware v3.0.0.136_20121102. The CVSS 8.6 rating reflects network reachability, low complexity, no privileges, no user interaction, and high availability impact. The listed weakness is CWE-20 input validation.
Likely exposure
Exposure is most likely where affected RLC-410W devices have reachable HTTP management interfaces, especially from untrusted networks. The bundle names only Reolink RLC-410W v3.0.0.136_20121102; do not assume other models or firmware are affected from these sources alone.
Exploitation context
The sources state that a specially crafted HTTP request can trigger a reboot. The CVE is not marked as CISA KEV in the bundle, and no provided source establishes active exploitation in the wild.
Researcher notes
Evidence supports a network-triggered denial of service in one named firmware version. The bundle does not name a patch level, fixed version, or active exploitation. Validation should remain non-destructive and focus on asset matching, exposure review, and vendor guidance.
Mitigation direction
- Identify affected Reolink RLC-410W devices and firmware versions.
- Restrict HTTP management access to trusted admin networks or VPN only.
- Remove any direct internet exposure for affected camera interfaces.
- Check Reolink or Talos guidance for vendor-approved firmware or mitigation details.
- Monitor affected devices for repeated unexpected reboots.
Validation and detection
- Inventory camera model and firmware against v3.0.0.136_20121102.
- Confirm whether cgiserver.cgi management endpoints are reachable from untrusted networks.
- Review firewall, NAT, and remote-access paths to camera management interfaces.
- Check device uptime and logs for unexplained reboot patterns.
- Document remediation evidence such as firmware status or access-control changes.
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-2021-44354 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.