Read the docs
TI-2021-17477 Aliases CVE-2021-40413GHSA-h2j2-qx54-6hmh

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 UpgradePrepare is the API that checks if a provided filename identifies a new version of the RLC-410W firmware. If the version is new, it would be possible, allegedly, to later on perform the Upgrade. An attacker can send an HTTP request to trigger this vulnerability.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0082 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-2021-40413
  2. 2026-10-03 Alias added: GHSA-h2j2-qx54-6hmh

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