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CVE Record

CVE-2021-44357: Multiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of...

Multiple denial of service vulnerabilities exist 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. 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

This vulnerability can let an unauthenticated network attacker reboot an affected Reolink RLC-410W camera with a crafted HTTP request. The main business risk is loss of camera availability, which can reduce physical security visibility and trigger operational disruption.

Executive priority

Treat this as high priority where affected cameras support security monitoring or are remotely reachable. The impact is availability, not data theft, but forced camera reboots can create security blind spots.

Technical view

CVE-2021-44357 is a CWE-20 input validation flaw in the cgiserver.cgi JSON command parser in Reolink RLC-410W firmware v3.0.0.136_20121102. The CVSS 3.0 score is 8.6, with network attack vector, low complexity, no privileges, no user interaction, and high availability impact.

Likely exposure

Exposure is limited by the provided evidence to Reolink RLC-410W cameras running firmware v3.0.0.136_20121102. Risk is highest where camera HTTP management interfaces are reachable from untrusted networks or broad internal segments.

Exploitation context

The sources state that a specially crafted HTTP request can trigger a reboot. The CVE is not marked KEV in the bundle, and no provided source establishes active exploitation in the wild.

Researcher notes

Do not generalize beyond the listed product and firmware without vendor evidence. The bundle does not name a patch. Validation should prioritize inventory and exposure review, avoiding production crash testing unless explicitly authorized.

Mitigation direction

  • Check Reolink and Talos guidance for fixed firmware or official mitigations.
  • Remove internet exposure from affected camera management interfaces.
  • Restrict access to trusted administration networks only.
  • Segment cameras from user and guest networks.
  • Monitor affected cameras for unexpected reboot patterns.

Validation and detection

  • Inventory Reolink RLC-410W cameras and record firmware versions.
  • Identify any devices running v3.0.0.136_20121102.
  • Review firewall rules for HTTP access to camera management interfaces.
  • Check external exposure using approved asset management data.
  • Review uptime and monitoring records for unexplained reboots.
Prepared
Confidence
high
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-2021-44357 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-2021-44357Attack 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
ReolinkRLC-410Wv3.0.0.136_20121102Listed
Weakness

CWE details

CWE-20

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