Is CVE-2020-13109 actively exploited?

No active exploitation of CVE-2020-13109 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-13109 be exploited remotely?

Yes. CVE-2020-13109 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-13109?

CVE-2020-13109 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-13109

CRITICAL

CVE-2020-13109

CWE-787Published: May 16, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Morita Shogi 64 through 2020-05-02 for Nintendo 64 devices allows remote attackers to execute arbitrary code via crafted packet data to the built-in modem because 0x800b3e94 (aka the IF subcommand to top-level command 7) has a stack-based buffer overflow.

NVD Source

Technical Analysis

CVE-2020-13109 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-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.