Is CVE-2021-41121 actively exploited?

No active exploitation of CVE-2021-41121 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-41121 be exploited remotely?

Yes. CVE-2021-41121 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-41121?

CVE-2021-41121 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2021-41121

CWE-119Published: October 6, 2021· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

Vyper is a Pythonic Smart Contract Language for the EVM. In affected versions when performing a function call inside a literal struct, there is a memory corruption issue that occurs because of an incorrect pointer to the the top of the stack. This issue has been resolved in version 0.3.0.

NVD Source

Technical Analysis

CVE-2021-41121 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.