VULNERABILITY INTELLIGENCE

CVE-2025-12888

CVSS score7.5 HIGH
EPSS probability0.31%
CISA KEVNot currently listed
Published2025-11-21
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architecture limitations, specifically with the Xtensa-based ESP32 chips. If targeting Xtensa it is recommended to use the low memory implementations of X25519, which is now turned on as the default for Xtensa.

Weakness classification

  • facts@wolfssl.com: CWE-203

Primary references