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Critical ‘React2Shell’ Flaw Added to CISA’s KEV Catalog for Immediate Patching – December 2025

Author/Source: The Hacker News See the full link here

Takeaway

This article explains a serious computer security problem called “React2Shell” that has been added to a special government list of known dangers. It highlights why this flaw is risky and why organizations need to fix it quickly to protect their systems from hackers.


Technical Subject Understandability

Intermediate


Analogy/Comparison

This security flaw is like a known weakness in a lock on many homes, and a government safety agency is telling everyone to fix their locks right away because bad people know how to use this weakness.


Why It Matters

This flaw is important because if it’s not fixed, hackers can take control of computer systems that use the affected software. For example, if exploited, attackers can run their own harmful instructions on a victim’s machine, which could lead to someone else taking over the entire system.


Related Terms

React2Shell, CISA’s KEV Catalog (Known Exploited Vulnerabilities), Electron, Remote Code Execution (RCE), Proof-of-Concept (PoC). Jargon Conversion: React2Shell is a serious weakness in a type of software called Electron that lets hackers take control of a computer. CISA’s KEV Catalog is a list from a US government agency that points out computer weaknesses that hackers are actively using. Electron is a tool that helps create computer programs using web technology. Remote Code Execution means a hacker can run their own harmful commands on someone else’s computer from a distance. A Proof-of-Concept is a demonstration showing how a security weakness can actually be used by an attacker.

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