CVE-2021-36219: Skale Sgxwallet

Critical severity, CVSS 9.8. EPSS: 1.7% chance of exploitation in the next 30 days.

An issue was discovered in SKALE sgxwallet 1.58.3. The provided input for ECALL 14 triggers a branch in trustedEcdsaSign that frees a non-initialized pointer from the stack. An attacker can chain multiple enclave calls to prepare a stack that contains a valid address. This address is then freed, resulting in compromised integrity of the enclave. This was resolved after v1.58.3 and not reproducible in sgxwallet v1.77.0.

Affected products

• Skale Sgxwallet: version 1.58.3 only

Published 2021-09-27. Last modified 2026-06-17.