High severityOSV Advisory· Published Jul 7, 2025· Updated Apr 15, 2026
CVE-2025-53540
CVE-2025-53540
Description
arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontrollers. Several OTA update examples and the HTTPUpdateServer implementation are vulnerable to Cross-Site Request Forgery (CSRF). The update endpoints accept POST requests for firmware uploads without CSRF protection. This allows an attacker to upload and execute arbitrary firmware, resulting in remote code execution (RCE). This vulnerability is fixed in 3.2.1.
Affected products
1- Range: 1.0.0, 1.0.0-RC0, 1.0.0-rc1, …
Patches
2ac961f671abdf4fdecc60c46Vulnerability mechanics
Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
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