Thursday, May 20, 2021

1 Update Published – 5-20-21

Today CISA’s NCCIC-ICS published an update for a control system security advisory for products from multiple RTOS vendors.


Multiple RTOS Update


This update provides new information for an advisory that was originally published on April 29th, 2021 and most recently updated on May 6th, 2021. The new information includes:

• Removing Micrium uCOS II/uCOS III from the list of affected products,

• Adding Micrium uC/OS: uC/LIB to the list of affected products,

• Removed CVE-2021-27407 from the list of vulnerabilities (it has also apparently been removed from the National Vulnerability Database),

• Removing update information for Micrium uCOS II/uCOS III, and

• Adding update information for Micrium uC/LIB

NOTE: The advisory mistakenly refers back to the original version (4-29-21), not the last update. 

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