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High severityOSV Advisory· Published Jul 7, 2025· Updated Jun 17, 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.

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Affected products

2
  • Espressif/Arduino Esp32OSV2 versions
    1.0.0, 1.0.0-RC0, 1.0.0-rc1, …+ 1 more
    • (no CPE)range: 1.0.0, 1.0.0-RC0, 1.0.0-rc1, …
    • (no CPE)range: >=3.2.1

Patches

Vulnerability mechanics

References

2

News mentions

0

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