CVE-2026-55687
Espressif · ESP-IDF
The Espressif IoT Development Framework (ESP-IDF) is vulnerable to multiple memory corruption issues, including stack-based buffer overflows.
Executive summary
Critical memory corruption vulnerabilities in ESP-IDF allow unauthenticated remote attackers to cause system crashes or potentially execute arbitrary code.
Vulnerability
This vulnerability encompasses stack-based buffer overflows (CWE-121) and out-of-bounds writes (CWE-787). These flaws allow an unauthenticated attacker to inject malicious data into memory, which can lead to system instability or potential code execution on IoT devices.
Business impact
The CVSS score of 7.5 highlights the severity of these memory corruption flaws. For organizations deploying IoT devices, successful exploitation could lead to total loss of device control, persistent denial-of-service, or unauthorized data access, posing a severe threat to operational integrity and security.
Remediation
Immediate Action: Update the ESP-IDF framework to the latest patched version (e.g., 6.0.2) and recompile all affected firmware images.
Proactive Monitoring: Monitor for unusual device behavior, such as unexpected reboots or crashes, which may indicate exploitation of these memory flaws.
Compensating Controls: Isolate IoT devices on segmented network VLANs to limit exposure to untrusted network traffic and reduce the attack surface.
Exploitation status
Public Exploit Available: No (exploit_available: false)
Analyst recommendation
Given the broad impact on embedded systems, developers must prioritize updating the ESP-IDF framework. Ensuring all firmware is rebuilt and deployed with the latest security patches is essential to protecting IoT infrastructure from remote exploitation.