remote code execution (RCE)
What is Remote Code Execution?
Remote Code Execution (RCE) is a type of cybersecurity vulnerability that allows an attacker to run arbitrary code on a target system from a remote location. This means the attacker doesn’t need physical access to the device - they can exploit the system over the internet or a network.
RCE is considered one of the most critical types of vulnerabilities because it often allows full control of the affected system, leading to data theft, service disruption, or even complete system takeover.
How does a remote code execution attack work?
RCE attacks typically occur when an application or server processes user-supplied data insecurely. If input isn’t properly validated or sanitized, attackers can inject and execute malicious code. Common attack vectors include:
- Unsafe file uploads
- Insecure deserialization
- Command injection
- Vulnerable web servers or plugins
Once successful, attackers can:
- Install malware
- Steal sensitive data
- Add backdoors
- Move laterally across a network
What is an RCE vulnerability?
An RCE vulnerability is the weakness in software that makes an RCE attack possible. These vulnerabilities are often found in web applications, CMS plugins, or APIs where developers unintentionally expose functionality that allows command execution.
High-profile RCE vulnerabilities, such as Log4Shell in Apache Log4j, have shown how devastating this type of flaw can be.
How to prevent remote code execution
To prevent RCE vulnerabilities:
- Validate and sanitize all inputs: Never trust user input; always check it.
- Use secure coding practices: Avoid functions that execute code from strings or external input.
- Apply security patches: Keep software up to date to close known vulnerabilities.
- Restrict application permissions: Run apps with the least privilege needed.
- Use web application firewalls (WAFs): They can help block known exploit patterns.
How Intruder helps detect RCE vulnerabilities
Intruder's exposure management platform includes checks for RCE vulnerabilities, helping you find and fix these issues before attackers do.
By using Intruder, you can:
- Continuously monitor your external and internal systems
- Prioritize critical issues like RCE with context
- Fix vulnerabilities with clear remediation advice
Start a free 14-day trial with Intruder to identify RCE risks and reduce your exposure.