Is CVE-2021-46320 actively exploited?

No active exploitation of CVE-2021-46320 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-46320 be exploited remotely?

Yes. CVE-2021-46320 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-46320?

CVE-2021-46320 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2021-46320

HIGH

CVE-2021-46320

CWE-665Published: February 4, 2022· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

In OpenZeppelin <=v4.4.0, initializer functions that are invoked separate from contract creation (the most prominent example being minimal proxies) may be reentered if they make an untrusted non-view external call. Once an initializer has finished running it can never be re-executed. However, an exception put in place to support multiple inheritance made reentrancy possible, breaking the expectation that there is a single execution.

NVD Source

Technical Analysis

CVE-2021-46320 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.