Is CVE-2021-34371 actively exploited?

No active exploitation of CVE-2021-34371 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-34371 be exploited remotely?

Yes. CVE-2021-34371 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-34371?

CVE-2021-34371 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-34371

CRITICAL

CVE-2021-34371

CWE-502Published: August 5, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Neo4j through 3.4.18 (with the shell server enabled) exposes an RMI service that arbitrarily deserializes Java objects, e.g., through setSessionVariable. An attacker can abuse this for remote code execution because there are dependencies with exploitable gadget chains.

NVD Source

Technical Analysis

CVE-2021-34371 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 complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.