Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated network attacker crash and reboot a vulnerable Reolink camera by sending a malformed HTTP request. The impact is service disruption, not data theft, but repeated reboots could impair monitoring or physical security coverage.
Executive priority
Treat as high priority for sites relying on these cameras for safety, facilities, or incident response. Prioritize exposed cameras first, because the reported impact is a remote reboot that can directly reduce monitoring availability.
Technical view
CVE-2021-44388 is a CWE-20 input validation issue in the cgiserver.cgi JSON command parser for Reolink RLC-410W firmware v3.0.0.136_20121102. Sources describe a malformed Login parameter that is not an object, causing a reboot. CVSS 3.0 is 8.6: network reachable, low complexity, no privileges, no user interaction, availability high.
Likely exposure
Exposure is most likely where Reolink RLC-410W cameras on the named firmware expose their HTTP management interface to untrusted networks. The provided affected-product metadata is incomplete, with vendor, product, CPE, and broader version range listed as n/a.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates the attack is unauthenticated and network based, so internet-facing or flat internal camera networks would carry higher operational risk.
Researcher notes
Evidence is specific to the JSON command parser in cgiserver.cgi and the malformed Login parameter condition. The public bundle does not provide a patch version, exploit-in-the-wild evidence, or complete CPE data, so validation should focus on exact model, firmware, and network exposure.
Mitigation direction
- Identify any Reolink RLC-410W cameras running firmware v3.0.0.136_20121102.
- Check Reolink and Talos guidance for firmware updates or vendor-approved mitigations.
- Remove camera HTTP management interfaces from direct internet exposure.
- Restrict camera management access to trusted admin networks only.
- Segment camera networks from business-critical systems where possible.
Validation and detection
- Inventory camera models and firmware versions against the named vulnerable version.
- Confirm whether HTTP management endpoints are reachable from untrusted networks.
- Review camera uptime and logs for unexpected reboot patterns.
- Verify any vendor firmware update or mitigation has been applied.
- Document remaining exposed devices and compensating network controls.
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
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Open ATT&CK lookupCVE-2021-44388 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.