Security Digest · Vulnerability record · Known exploited
CVE-2021-40407: Reolink RLC-410W IP Camera OS Command Injection Vulnerability
Exploited in the wild (CISA KEV). An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.13620121102.
CISA KEV · added 2024-12-18 CVSS 9.1 Critical EPSS 47.6% · p99
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Reolink RLC-410W IP Camera. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-12-18, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-01-08; treat that as the outer limit, not the target.
- EPSS 47.6%, percentile 99: FIRST’s model estimates a 47.6% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs an account (high (admin)). Exposure depends on who can log in.
What it is
An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.13620121102. 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, is not validated properly. This would lead to an OS command injection. An attacker can send an HTTP request to trigger this vulnerability.
CISA’s summary
Reolink RLC-410W IP cameras contain an authenticated OS command injection vulnerability in the device network settings functionality.
Weakness type: CWE-78.
Product: Reolink RLC-410W IP Camera · Assigned by: talos · Published: 2022-01-28
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| talos | 3.0 | 9.1 Critical | CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: high (admin)
- User interaction: none
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2024-12-18; federal due date 2025-01-08. Known ransomware use: Unknown.
- CISA required action: The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization if a current mitigation is unavailable.
- CISA SSVC assessment: exploitation active, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 47.63% probability of exploitation activity in the next 30 days; percentile 99.
Timeline
- — CVE record published by talos
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (reolink.com) reolink.com
- Listed in CISA KEV notes (reolink.com) reolink.com
Vulnerability records
- CVE.org record CVE-2021-40407 cve.org
- NVD entry CVE-2021-40407 nvd.nist.gov
Government
Other references from the CVE record and advisory
- talosintelligence.com talosintelligence.com
All exploited Reolink vulnerabilities · Today’s Security Digest