CVE-2021-36219

Name: CVE-2021-36219
Creator: NVD / NIST
Published: 2021-09-27T14:15:08.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.58%

Last modified Jun 17, 2026

CVE-2021-36219 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 1.58% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.58%

72.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-824

Affected Software

Vendor	Product	Versions
Skale	Sgxwallet	1.58.3

References

https://github.com/skalenetwork/sgxwallet/commit/4e9b5b7526db083177e81f8bafeaa4914d276a82Patch, Third Party Advisory
https://github.com/skalenetwork/sgxwallet/releasesRelease Notes, Third Party Advisory
https://github.com/skalenetwork/sgxwallet/commit/4e9b5b7526db083177e81f8bafeaa4914d276a82Patch, Third Party Advisory
https://github.com/skalenetwork/sgxwallet/releasesRelease Notes, Third Party Advisory

Timeline

Published: Sep 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-36219?

How severe is CVE-2021-36219?

CVE-2021-36219 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.58% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36219?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36219?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST