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TI-2021-17478 Aliases CVE-2021-40414GHSA-wjf2-8m9f-c656

An incorrect default permission vulnerability exists in the cgiserver.cgi…

Priority MEDIUM 64CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

An incorrect default permission vulnerability exists in the cgiserver.cgi cgi_check_ability functionality of reolink RLC-410W v3.0.0.136_20121102. The SetMdAlarm API sets the movement detection parameters, giving the ability to set the sensitivity of the camera per a range of hours, and which of the camera spaces to ignore when considering movement detection. Because in cgi_check_ability the SetMdAlarm API does not have a specific case, the user permission will default to 7. This will give non-administrative users the possibility to change the movement detection parameters.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00807 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:reolink:rlc-410w_firmware:3.0.0.136_20121102:*:*:*:*:*:*:*3.0.0.136_20121102VulnerableReolink
cpe:2.3:h:reolink:rlc-410w:-:*:*:*:*:*:*:*not specified by NVDRunning onReolink
  • cpe:2.3:o:reolink:rlc-410w_firmware:3.0.0.136_20121102:*:*:*:*:*:*:* Versions 3.0.0.136_20121102 Vulnerable ·Reolink
  • cpe:2.3:h:reolink:rlc-410w:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Reolink

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-40414
  2. 2026-10-03 Alias added: GHSA-wjf2-8m9f-c656

References

Exploit 1

  • TI-2021-17471 An OS command injection vulnerability exists in the device network settings functionality… KEVCVSS 3.1HIGH 7.2
  • TI-2019-08219 On Reolink RLC-410W, C1 Pro, C2 Pro, RLC-422W, and RLC-511W devices through 1.0.227, an… KEVCVSS 3.1HIGH 7.2
  • TI-2021-17473 An OS command injection vulnerability exists in the device network settings functionality… CVSS 3.1CRITICAL 9.8
  • TI-2021-17472 An OS command injection vulnerability exists in the device network settings functionality… CVSS 3.1CRITICAL 9.8
  • TI-2021-17483 A firmware update vulnerability exists in the 'factory' binary of reolink RLC-410W… CVSS 3.1HIGH 7.5
  • TI-2021-20034 A denial of service vulnerability exists in the cgiserver.cgi JSON command parser… CVSS 3.1HIGH 7.7
See all 87 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences