CVE-2021-40405Public exploitNetwork attack vector

Authenticated camera reboot via failed permission check

Published Apr 14, 2022 · Updated Apr 15, 2025

Improper access control in the Reolink RLC-410W 3.0.0.136_20121102 Upgrade API allows remote authenticated users to reboot the camera. When Upgrade permission validation fails, cgiserver.cgi incorrectly sets the associated request's perform_reboot flag instead of only rejecting the call. Any logged-in user without Upgrade permission can repeatedly restart the camera and interrupt surveillance availability.

CVSS severity7.7
High
EPSS probability1.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in the Reolink RLC-410W 3.0.0.136_20121102 Upgrade API allows remote authenticated users to reboot the camera. When Upgrade permission validation fails, cgiserver.cgi incorrectly sets the associated request's perform_reboot flag instead of only rejecting the call. Any logged-in user without Upgrade permission can repeatedly restart the camera and interrupt surveillance availability.

The record

CVE
CVE-2021-40405
Published
Apr 14, 2022
Updated
Apr 15, 2025
Vendor
Reolink
Product
RLC-410W
Classifications
CWE-284, CWE-404, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=v3.0.0.136_20121102

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Reolink · RLC-410Wversion=v3.0.0.136_20121102

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.7Cisco TalosCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
6.8NIST NVDAV:N/AC:L/Au:S/C:N/I:N/A:C

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-404Improper Resource Shutdown or Release
T1499Endpoint Denial of Service

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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