What it is
Remote code execution (RCE) refers to a class of vulnerabilities that allow an attacker to run arbitrary commands or code on a system from a remote location. RCE typically arises when applications process untrusted input through interpreters, deserializers, or scripting engines without proper validation. Common sources include unsafe deserialization, injection flaws, buffer overflows, and insecure file uploads. Once attackers gain execution, they can install backdoors, escalate privileges, pivot to other systems, or encrypt data for ransom. Modern exploit kits chain multiple vulnerabilities—such as an authentication bypass followed by an RCE—to maximize impact. Because RCE grants full control over the affected asset, it is one of the most critical vulnerability categories, often receiving the highest CVSS scores and widespread emergency advisories.
Why it matters
RCE vulnerabilities can compromise customer data, intellectual property, and operational technology within minutes of exploitation. They are attractive to both financially motivated criminals and advanced persistent threats, making rapid remediation vital to cyber resilience.
How to reduce risk
- Maintain rigorous patch management and subscribe to threat intelligence feeds that flag actively exploited RCE vulnerabilities.
- Apply secure coding practices, including input validation, sandboxing of untrusted code, and strict deserialization controls.
- Segment networks so that a single exploited system cannot directly reach crown jewels.
- Monitor for indicators of exploitation such as unusual child processes, outbound network connections, or webshell artifacts.