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TI-2025-33484 Aliases CVE-2025-53540

CSRF Vulnerability in Firmware Update Endpoints Allows Remote Code Execution

Priority HIGH 71CWE-352Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Tampering
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-352.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00334 26th percentileScored 2026-11-07
Fix Fixed arduino-esp32 (espressif): 3.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
espressifarduino-esp32before 3.2.13.2.1Patch availableCNA
  • arduino-esp32 Vendorespressif Affected before 3.2.1 Fixed in 3.2.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:espressif:arduino-esp32:*:*:*:*:*:*:*:*——espressif
  • cpe:2.3:a:espressif:arduino-esp32:*:*:*:*:*:*:*:* Versions — — ·espressif

Remediation

  • Fix · CNA arduino-esp32 (espressif) Fixed in 3.2.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-53540

References

Other 2

  • TI-2026-31061 arduino-esp32: Stack buffer overflow in WebServer multipart boundary parsing leads to remote crash potential RCE CVSS 3.1CRITICAL 9.8
  • TI-2024-30765 Multiple Poisoned Pipeline Execution (PPE) vulnerabilities CVSS 3.1CRITICAL 10.0
  • TI-2026-30028 Improper validation of NBNS name_len in arduino-esp32 NetBIOS leads to memory corruption CVSS 3.1HIGH 8.8
  • TI-2024-22076 Buffer Overflow vulnerability in esp-idf v.5.1 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
  • TI-2025-33011 arduino-esp32 vulnerable to CRLF injection in WebServer.cpp CVSS 4.0HIGH 8.9
  • TI-2026-85138 Unvalidated stack pointer at ESP-TEE boundary in esp-idf CVSS 3.1CRITICAL 9.3
See all 58 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences