Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated remote party reboot a vulnerable Reolink camera by sending a crafted HTTP request. The main business risk is interruption of video coverage, not theft or alteration of data based on the provided sources.
Executive priority
High for organizations relying on affected cameras for continuous surveillance or safety monitoring, especially if camera management interfaces are exposed. Lower urgency where the exact firmware is absent or access is tightly restricted.
Technical view
CVE-2021-44416 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 Disconnect parameter that is not an object, causing a reboot. CVSS rates availability impact high.
Likely exposure
Exposure is likely limited to Reolink RLC-410W cameras running firmware v3.0.0.136_20121102 with reachable HTTP management functionality. The CVE affected-product metadata is incomplete, so confirm assets against vendor and Talos details.
Exploitation context
The source bundle says an attacker can send an HTTP request to trigger the reboot. It does not show CISA KEV listing, active exploitation, public exploitation campaigns, or a vendor-confirmed patch.
Researcher notes
The evidence supports a remotely triggerable denial of service with no privileges or user interaction. The weakness maps to CWE-20. Affected-product metadata in the CVE record is weak, so researchers should avoid broad product claims beyond the named model and firmware.
Mitigation direction
- Check Reolink and Talos guidance for firmware or configuration updates.
- Remove direct internet exposure for camera HTTP interfaces.
- Restrict camera management access to trusted networks or VPNs.
- Prioritize cameras supporting critical monitoring or physical security.
- Monitor vulnerable devices for unexpected reboots or service loss.
Validation and detection
- Inventory Reolink RLC-410W devices and firmware versions.
- Identify whether camera HTTP interfaces are reachable from untrusted networks.
- Review logs or uptime telemetry for unexplained reboots.
- Confirm whether vendor guidance names a fixed firmware version.
- Track this CVE in vulnerability management until affected assets are resolved.
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-2021-44416 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.