CVE-2020-13109: Morita Shogi 64 through 2020-05-02 for Nintendo 64 devices allows remote attackers to execute arbitrary code v

Q: How do I fix CVE-2020-13109?

morita shogi 64: upgrade to newer than 2020-05-02. Exact commands for each OS are on this page.

Q: Is CVE-2020-13109 being exploited?

CVE-2020-13109 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-13109 affect?

CVE-2020-13109 affects morita shogi 64. Severity is critical (CVSS 9.8). 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 b

Q: How urgent is CVE-2020-13109?

Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-13109 is a critical-severity flaw (CVSS 9.8) affecting morita shogi 64. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.9% (top 8%)
CISA exploited list	No
Weakness	CWE-787
Published	2020-05-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: seta

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-05-16 02:15 UTCPublished CVE record published
2026-06-17 02:52 UTCUpdated Record last modified

seta morita shogi 64 UPGRADE

Affected: <= 2020-05-02

Fixed in: newer than 2020-05-02

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy morita-shogi-64 || rpm -q morita-shogi-64 || morita-shogi-64 --version

2. UPGRADE to newer than 2020-05-02 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade morita-shogi-64

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade morita-shogi-64

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-13109?

morita shogi 64: upgrade to newer than 2020-05-02. Exact commands for each OS are on this page.

Is CVE-2020-13109 being exploited?

CVE-2020-13109 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-13109 affect?

CVE-2020-13109 affects morita shogi 64. Severity is critical (CVSS 9.8). 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 b

How urgent is CVE-2020-13109?

Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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