PatchTheCVEarduino-esp32 vulnerabilities and fixes
Recent CVEs affecting arduino-esp32, with upgrade or downgrade steps. 2 tracked.
Also searched as: arduino esp32.
arduino-esp32 has 2 tracked vulnerabilities, 1 critical. A fixed release or vendor patch exists for 2. Most recent: 2026-05-12. Highest priority: CVE-2026-42854 (score 56/100).
- CVE-2026-42854 CRITICAL 9.8 UPGRADE arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontr
- CVE-2026-42855 HIGH 7.5 UPGRADE arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontr
FAQ
How do I fix arduino-esp32 vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is arduino-esp32 being exploited right now?
None of the tracked arduino-esp32 CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which arduino-esp32 CVE should I patch first?
CVE-2026-42854 currently ranks highest (56/100): arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontr.