Security readout for executives and security teams
Plain-English summary
This CVE affects a Reolink camera HTTP management component and can let a remote, unauthenticated attacker force a device reboot. The business impact is availability loss, especially for security monitoring sites that depend on these cameras.
Executive priority
Treat as high priority for sites using the named Reolink camera firmware. The issue threatens camera availability, not confidentiality or integrity, but repeated reboots could weaken physical security monitoring and incident response visibility.
Technical view
The flaw is improper input validation in the cgiserver.cgi JSON command parser on Reolink RLC-410W v3.0.0.136_20121102. A malformed GetMdState parameter can trigger denial of service by rebooting the device. CVSS 3.0 is 8.6, with network attack vector and no privileges or user interaction required.
Likely exposure
Exposure is most likely where Reolink RLC-410W cameras running v3.0.0.136_20121102 have reachable HTTP management interfaces, especially from untrusted networks. The source bundle does not identify broader affected versions or products.
Exploitation context
The provided sources describe a specially crafted HTTP request causing reboot. CISA KEV status is false in the bundle, and no cited source here confirms active exploitation in the wild.
Researcher notes
Evidence is specific to Reolink RLC-410W v3.0.0.136_20121102 and CWE-20 input validation. The bundle does not provide a vendor patch version, expanded affected range, or confirmed exploitation. Avoid extrapolating beyond the named firmware without vendor confirmation.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or vendor-approved mitigations.
- Restrict camera HTTP management access to trusted admin networks or VPN.
- Remove direct internet exposure with firewall rules or router access controls.
- Monitor affected cameras for unexpected reboots and availability drops.
- Prioritize compensating controls where firmware status is unknown.
Validation and detection
- Inventory Reolink RLC-410W devices and record firmware versions.
- Identify whether cgiserver.cgi or HTTP management is reachable from untrusted networks.
- Review firewall, router, and remote-access rules for camera management paths.
- Correlate camera reboot events with suspicious HTTP access attempts.
- Use vendor-safe checks; avoid crafted crash testing in production.
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-2021-44418 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.