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CVE-2021-44380: A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink...

A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A specially-crafted HTTP request can lead to a reboot. SetTime param is not object. An attacker can send an HTTP request to trigger this vulnerability.

HighCVSS 8.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-44380 lets an unauthenticated attacker reboot an affected Reolink RLC-410W camera by sending a malformed HTTP request. The business impact is availability: disrupted video monitoring and repeated device outages, especially if camera management interfaces are reachable from untrusted networks.

Executive priority

Prioritize if these cameras support physical security, safety monitoring, or exposed remote access. Treat internet-exposed or mission-critical deployments as urgent availability risk; isolated lab or noncritical cameras are lower urgency.

Technical view

The issue is improper input validation in the cgiserver.cgi JSON command parser on Reolink RLC-410W v3.0.0.136_20121102. The source description says the SetTime parameter is not an object, and a crafted HTTP request can trigger a reboot. CVSS is 8.6, network exploitable, low complexity, no privileges, no user interaction.

Likely exposure

Exposure is most likely where affected Reolink RLC-410W camera web interfaces are reachable over LAN, VPN, or the internet. The bundle does not provide CPE coverage or a broader affected-version list.

Exploitation context

The sources describe remote unauthenticated denial of service by HTTP request. The bundle says this CVE is not in KEV, and no provided source confirms active exploitation in the wild.

Researcher notes

Evidence is specific to Reolink RLC-410W v3.0.0.136_20121102 and CWE-20. The bundle does not name a fixed version, patch status, or confirmed exploitation. Avoid broad product assumptions without vendor confirmation.

Mitigation direction

  • Restrict camera management interfaces to trusted admin networks or VPN.
  • Check Reolink or Talos guidance for fixed firmware or supported remediation.
  • Upgrade affected firmware only when a vendor-supported update is confirmed.
  • Monitor for repeated camera reboots and suspicious cgiserver.cgi requests.
  • Avoid exposing camera administration services directly to the internet.

Validation and detection

  • Inventory Reolink RLC-410W devices and record firmware versions.
  • Identify devices running v3.0.0.136_20121102.
  • Review external attack surface for exposed camera web interfaces.
  • Check logs or monitoring for unexplained reboots.
  • Confirm remediation status against vendor guidance.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CWE-20: Exact CWE lookup

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cve · low confidence lookup

CVE-2021-44380 mapping review

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
8.6CVSS 3.0HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H3.94Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

8.6High
CVSS 3.0 vector shape for CVE-2021-44380Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

CWE-20

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.