CVE-2025-53540
High
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.
SeverityHigh
CVSS8.7
Exploit probability—
ProductEspressif Arduino-esp32
PublishedJul 7, 2025
First seenJul 7, 2025
Weakness typeCWE-352Cross-site request forgery (CSRF)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| espressif arduino-esp32 | < 3.2.1 | — |
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