CVE-2021-44396Public exploitNetwork attack vector

Unauthenticated camera reboot via malformed Preview parameter

Published Jan 28, 2022 · Updated Apr 15, 2025

Improper input validation in Reolink RLC-410W 3.0.0.136_20121102 allows remote attackers to reboot the camera via an HTTP request. The cgiserver.cgi Preview command parser assumes its JSON param element is an object and applies the subscription operator to a non-object value, reaching an assertion that terminates the process. No authentication or user interaction is required, and the resulting process failure reboots the physical camera and interrupts its service.

CVSS severity8.6
High
EPSS probability1.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Reolink RLC-410W 3.0.0.136_20121102 allows remote attackers to reboot the camera via an HTTP request. The cgiserver.cgi Preview command parser assumes its JSON param element is an object and applies the subscription operator to a non-object value, reaching an assertion that terminates the process. No authentication or user interaction is required, and the resulting process failure reboots the physical camera and interrupts its service.

The record

CVE
CVE-2021-44396
Published
Jan 28, 2022
Updated
Apr 15, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
8.6Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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