Security readout for executives and security teams
Plain-English summary
This issue can let a remote attacker crash and reboot a specific Reolink RLC-410W camera by sending a malformed HTTP request. The main business impact is loss of camera availability, not data theft or integrity compromise, based on the provided sources.
Executive priority
Prioritize remediation for cameras protecting critical sites or exposed beyond trusted admin networks. The impact is availability loss, so urgency depends on how much security monitoring or operations rely on affected cameras staying online.
Technical view
CVE-2021-44358 is a CWE-20 input validation flaw in the cgiserver.cgi JSON command parser of Reolink RLC-410W v3.0.0.136_20121102. The SetRec parameter being the wrong JSON type can trigger a device reboot. CVSS is 8.6: network reachable, low complexity, unauthenticated, availability impact high.
Likely exposure
Exposure is most likely where affected Reolink RLC-410W cameras have their HTTP management/API surface reachable from untrusted networks. Internet-facing, port-forwarded, or flat internal networks increase risk. The source bundle does not identify other affected models or firmware versions.
Exploitation context
The provided record says an attacker can trigger the issue with an HTTP request, but does not provide evidence of active exploitation. CISA KEV status is false in the bundle. Treat this as realistically exploitable where the affected service is reachable, but not confirmed exploited in the wild.
Researcher notes
The public metadata is specific about parser behavior and firmware version, but affected CPE data is absent and no patch version is named in the supplied bundle. Avoid broad product claims without vendor confirmation. Validate exposure through inventory and network reachability, not by reproducing the crash.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or official workarounds.
- Remove camera HTTP interfaces from direct internet exposure.
- Restrict access to trusted admin networks or VPN only.
- Use firewall rules to block untrusted access to camera management services.
- Monitor affected cameras for unexpected reboots or availability drops.
Validation and detection
- Inventory Reolink RLC-410W cameras and record firmware versions.
- Identify devices running v3.0.0.136_20121102.
- Review NAT, firewall, and VPN rules for camera HTTP exposure.
- Check uptime, monitoring, and logs for unexplained reboots.
- Confirm compensating controls block untrusted HTTP access.
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
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-44358 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.