CVE-2021-40407
RCE in Reolink Rlc-410W Firmware 3.0.0.136_20121102
Raw vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2021-40407 is a high-severity OS Command Injection (CWE-78) vulnerability in Reolink Rlc-410W Firmware. Its CVSS base score is 7.2 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique NTDS (T1003.003); ranked in the top 1% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
An OS command injection vulnerability exists in the device network settings functionality of the Reolink RLC-410W camera running firmware version 3.0.0.136_20121102. The flaw occurs when handling the ddns->domain variable supplied to the SetDdns API, where the value is not properly validated based on the selected DDNS type, allowing arbitrary operating system commands to be executed.
An authenticated attacker with administrative privileges can send a crafted HTTP request containing a malicious domain parameter to trigger the vulnerability. Successful exploitation grants the ability to execute arbitrary commands on the device, resulting in full control over confidentiality, integrity, and availability of the affected camera.
The issue is documented in detail in the Talos Intelligence advisory TALOS-2021-1424 and appears in the CISA Known Exploited Vulnerabilities catalog, indicating confirmed real-world exploitation. No specific patch or mitigation details are provided in the available references.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-27584
Vulnerability Data
An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [1] or [2], based on DDNS type, the ddns->domain variable, that has the value of the domain parameter provided through the SetDdns API,…
more
is not validated properly. This would lead to an OS command injection. An attacker can send an HTTP request to trigger this vulnerability.
- CWE(s)
- KEV Date Added
- 18 December 2024
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V1.2.5V1.2.8
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.
Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.