CVE-2025-53540

CSRF Vulnerability in Firmware Update Endpoints Allows Remote Code Execution

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.

References

Link	Tags
https://github.com/espressif/arduino-esp32/security/advisories/GHSA-9vfw-wx65-c872
https://github.com/espressif/arduino-esp32/commit/f4fdecc60c465384e465a4b1d2bd1eac8f67912e

Frequently Asked Questions

What is the severity of CVE-2025-53540?: CVE-2025-53540 has been scored as a high severity vulnerability.
How to fix CVE-2025-53540?: To fix CVE-2025-53540, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-53540 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-53540 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-53540?: CVE-2025-53540 affects espressif arduino-esp32.

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Description

Category

CWE-352 – Cross-Site Request Forgery (CSRF)

References

Frequently Asked Questions