Security readout for executives and security teams
Plain-English summary
CVE-2021-44385 can let a remote, unauthenticated attacker reboot a specific Reolink camera model by sending a malformed HTTP request. The impact is availability loss, not data theft, but repeated reboots could disrupt monitoring, evidence capture, or site security operations.
Executive priority
Treat this as high priority for sites where cameras support physical security, safety monitoring, or compliance evidence. Internet-exposed devices should be addressed first because exploitation requires no credentials.
Technical view
The source describes improper input validation in the Reolink RLC-410W v3.0.0.136_20121102 cgiserver.cgi JSON command parser. A SetPtzSerial parameter with an unexpected type can trigger a denial of service reboot. CVSS 3.0 is 8.6: network-accessible, low complexity, no privileges, no user interaction, high availability impact.
Likely exposure
Exposure is most likely where Reolink RLC-410W cameras with firmware v3.0.0.136_20121102 have reachable HTTP management endpoints. The structured CVE affected-product fields are incomplete, so asset validation is necessary.
Exploitation context
The bundle does not cite active exploitation, and the CVE is not marked CISA KEV. Public evidence supports remote denial of service by crafted HTTP request, but not compromise, persistence, or data access.
Researcher notes
Evidence is limited to the CVE description and Talos reference. The CVE affected array is not populated, but the description names Reolink RLC-410W v3.0.0.136_20121102. Do not broaden scope without vendor confirmation.
Mitigation direction
- Check Reolink or Talos guidance for firmware updates or workarounds before production changes.
- Remove camera HTTP management interfaces from direct internet exposure.
- Restrict access with firewall rules, VPN, and management VLANs.
- Monitor affected cameras for repeated reboots and availability loss.
- Plan replacement or compensating controls if no supported firmware is available.
Validation and detection
- Inventory Reolink RLC-410W devices and record firmware versions.
- Confirm whether any device runs v3.0.0.136_20121102.
- Review perimeter exposure for reachable camera HTTP interfaces.
- Check monitoring logs for unexplained camera reboots or availability drops.
- Verify segmentation prevents untrusted access to camera management services.
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-2021-44385 mapping review
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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.