Security readout for executives and security teams
Plain-English summary
This issue can let a remote attacker force a vulnerable Reolink RLC-410W camera to reboot by sending a crafted HTTP request. The business impact is service disruption: camera downtime, reduced monitoring coverage, and possible repeated outages if the device is reachable from untrusted networks.
Executive priority
Treat this as a high-priority availability risk for sites relying on affected cameras for monitoring or physical security. Prioritize exposed devices first, then internal devices in less trusted network zones.
Technical view
The vulnerability is improper input validation in the cgiserver.cgi JSON command parser. For Reolink RLC-410W firmware v3.0.0.136_20121102, a malformed DelUser parameter can trigger a reboot. The CVSS vector indicates unauthenticated, network-reachable, low-complexity denial of service with high availability impact.
Likely exposure
Exposure is most likely where the specific Reolink RLC-410W firmware is deployed and its HTTP management/API surface is reachable from the internet, guest networks, or other untrusted segments. The provided CVE metadata does not identify broader affected products.
Exploitation context
The source bundle describes attacker-triggered reboot through an HTTP request. It does not include CISA KEV listing or other evidence of active exploitation, so active exploitation should not be assumed from these sources.
Researcher notes
The CVE affected-product fields are not normalized, but the description names Reolink RLC-410W v3.0.0.136_20121102. Evidence is specific to denial of service and reboot behavior; no confidentiality or integrity impact is described in the supplied sources.
Mitigation direction
- Inventory Reolink RLC-410W cameras and identify firmware v3.0.0.136_20121102.
- Check Reolink or Talos guidance for fixed firmware or vendor-recommended mitigation.
- Restrict camera HTTP management access to trusted administration networks only.
- Remove internet exposure for affected camera interfaces where present.
- Monitor affected devices for repeated unexplained reboots or availability drops.
Validation and detection
- Confirm whether any deployed camera matches Reolink RLC-410W firmware v3.0.0.136_20121102.
- Review firewall, VPN, and NAT rules for camera HTTP interface exposure.
- Check uptime, device logs, and monitoring alerts for unexpected reboot patterns.
- Verify vendor guidance before performing active vulnerability testing.
- Document compensating controls if fixed firmware is unavailable or unconfirmed.
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-2021-44414 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.