high Known exploitedREV. 01

CVE-2021-40407Reolink camera — command injection in the network settings

The affected Reolink camera firmware (RLC-410W v3.0.0.136) passes a domain name from the dynamic address settings into a shell command, so a signed-in user runs their own code on the device.

YOUR NEXT MOVE

Update the camera firmware now; exploit code is public, so change the administrator password and keep these devices off routable networks.

Read the risk

THE VITAL STATS
CVSS score
7.2/ 10
CVSS v3.1
EPSS probability
48%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2022-01-28
Added to KEV
2024-12-18
Exploit published
Yes
Confidence
high
Kill chain
execution
MITRE ATT&CK
T1059
Severity
high

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attacker needsA valid login on the camera's web interface.

Behind the card

3 REFERENCES
Field-level provenanceTRACE THE SOURCES +

Which source supports each field, when it was retrieved, and who extracted it.

FieldsSourceRetrievedExtractorConfidence
cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_atnvd.nist.gov2026-09-24scrty-crds-pipeline/0.1high
exploitation.known_exploited, exploitation.kev_addedcisa.gov2026-09-24scrty-crds-pipeline/0.1high
epssapi.first.org2026-09-24scrty-crds-pipeline/0.1high
title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisitesnvd.nist.gov2026-09-24claude-codehigh

Printing history

THE RECORD
  1. r1Initial base card

First printing. This card has not been reprinted since publication.

crds:cve-2021-40407 · CRDS 0.1 · Issued 2026-09-24