Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated network attacker crash and reboot a specific Reolink camera model by sending a malformed HTTP request. The business impact is availability loss: cameras may drop offline, interrupting monitoring or physical security operations.
Executive priority
Prioritize this for exposed or security-critical camera deployments. The issue is not described as data theft, but repeated reboots can degrade surveillance reliability and incident visibility.
Technical view
CVE-2021-44365 is a CWE-20 input validation issue in the cgiserver.cgi JSON command parser for Reolink RLC-410W v3.0.0.136_20121102. The SetDevName parameter handling can trigger denial of service and device reboot. CVSS is 8.6, network exploitable, low complexity, no privileges, no user interaction, availability impact only.
Likely exposure
Exposure is most likely where Reolink RLC-410W cameras running v3.0.0.136_20121102 have their HTTP management interface reachable from untrusted networks or the internet.
Exploitation context
The supplied sources support remote denial of service via crafted HTTP traffic. They do not show CISA KEV listing, active exploitation, public weaponization status, or a named fixed firmware version.
Researcher notes
Evidence is limited to the CVE record and Talos reference. Treat scope narrowly: Reolink RLC-410W v3.0.0.136_20121102, cgiserver.cgi JSON parsing, SetDevName handling, unauthenticated network denial of service.
Mitigation direction
- Check Reolink and Talos guidance for fixed firmware or vendor-recommended remediation.
- Remove camera HTTP management interfaces from internet exposure.
- Restrict access to trusted management networks, VPNs, or administrative hosts only.
- Segment affected cameras from business-critical networks.
- Replace or retire devices if supported remediation is unavailable.
Validation and detection
- Inventory Reolink RLC-410W devices and record firmware versions.
- Confirm whether v3.0.0.136_20121102 is present in the environment.
- Identify any exposed camera HTTP management interfaces.
- Review monitoring for unexplained camera reboots or availability gaps.
- Track vendor advisories for confirmed remediation details.
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-2021-44365 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.