Security readout for executives and security teams
Plain-English summary
This issue can let an unauthenticated network attacker crash and reboot a vulnerable Reolink camera with a crafted HTTP request. The main business impact is loss of camera availability, not data theft. The CVSS score is high because attack requirements are low and availability impact is high.
Executive priority
Treat this as a high-priority availability risk for exposed or operationally important cameras. Prioritize internet-facing devices and locations where camera downtime affects physical security, safety monitoring, or incident response.
Technical view
CVE-2021-44397 affects the cgiserver.cgi JSON command parser in Reolink RLC-410W v3.0.0.136_20121102. Improper input validation can cause a denial of service reboot when malformed HTTP input reaches the parser. CVSS 3.0 is 8.6, network exploitable, low complexity, no privileges, no user interaction.
Likely exposure
Exposure appears limited to Reolink RLC-410W cameras running v3.0.0.136_20121102 with reachable HTTP management interfaces. The CVE affected vendor and product fields are n/a, so exact product scope is source-limited rather than comprehensive.
Exploitation context
The sources state an attacker can send an HTTP request to trigger the reboot condition. CISA KEV status is false, and the provided sources do not claim active exploitation in the wild.
Researcher notes
The primary evidence is Cisco Talos and CVE metadata. Affected scope and fix status are incomplete in the provided bundle. Avoid assuming other Reolink models are affected unless vendor or researcher sources confirm it.
Mitigation direction
- Check Reolink guidance for affected firmware and fixed versions.
- Apply vendor firmware updates if a fixed release is available.
- Restrict camera HTTP management access to trusted admin networks.
- Block internet exposure for camera management interfaces.
- Segment surveillance devices from business-critical networks.
- Monitor camera uptime for unexpected reboot patterns.
Validation and detection
- Inventory Reolink RLC-410W cameras and firmware versions.
- Identify whether HTTP management interfaces are reachable from untrusted networks.
- Review firewall and NAT rules for exposed camera services.
- Check device logs or monitoring for unexplained reboot events.
- Confirm vendor advisories before declaring remediation complete.
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-2021-44397 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.