Is CVE-2026-3431 actively exploited?

No active exploitation of CVE-2026-3431 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3431 be exploited remotely?

Yes. CVE-2026-3431 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3431?

CVE-2026-3431 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-3431

CWE-862Published: March 2, 2026· Updated: Mar 6, 2026

9.8

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:20.5th

Official Description

On SimStudio version below to 0.5.74, the MongoDB tool endpoints accept arbitrary connection parameters from the caller without authentication or host restrictions. An attacker can leverage these endpoints to connect to any reachable MongoDB instance and perform unauthorized operations including reading, modifying, and deleting data.

NVD Source

Technical Analysis

CVE-2026-3431 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.