CVE-2026-21411 Auth bypass in OpenBlocks IDM RX1 (FW5.0.x)
Attackers can bypass administrator authentication to change passwords on OpenBlocks IoT devices, requiring firmware upgrades to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21411?
CVE-2026-21411 is a high-severity authentication bypass vulnerability in Plat'Home Co.,Ltd. OpenBlocks IDM RX1 (FW5.0.x), published on 6 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Authentication bypass issue exists in OpenBlocks series versions prior to FW5.0.8, which may allow an attacker to bypass administrator authentication and change the password.
Weakness: CWE-288
Which versions are affected by CVE-2026-21411?
How do I fix CVE-2026-21411?
No fix has been published for CVE-2026-21411 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-21411 being exploited?
There is no known exploitation of CVE-2026-21411 in the wild and no public exploit code.
Sources
Also known as GHSA-xm4x-3r5h-vwfr.