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.