Security readout for executives and security teams
Plain-English summary
CVE-2018-25109 is a memory corruption issue in specific GameCube-era Nintendo Animal Crossing titles. Business urgency is usually limited because exploitation requires physical-device context and high attack complexity, but preservation labs, museums, collectors, and emulator or research environments handling untrusted game data should treat it as a real integrity and availability risk.
Executive priority
Prioritize as moderate and niche. It is not a broad enterprise emergency, but teams managing retro gaming assets, exhibits, or security research labs should control untrusted media and document exposure because public exploit material is available.
Technical view
The reported flaw affects the Letter Trigram Handler in Animal Crossing, Doubutsu no Mori+, and Doubutsu no Mori e+ versions 1.00 and 1.01. Manipulated trigram-related letter data can cause memory corruption. The CVSS vector is physical access, high complexity, no privileges, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Likely exposure is narrow: physical GameCube devices, affected game versions, and research or preservation workflows using related game data. Mainstream enterprise exposure is unlikely unless these titles or derived artifacts are handled in labs, museums, events, or emulator testing environments.
Exploitation context
The bundle says public exploit material exists, but KEV is false and no cited source establishes active exploitation. The attack is described as difficult and physical-device based, so risk depends heavily on access to affected media, consoles, or trusted workflows that process untrusted Animal Crossing data.
Researcher notes
Evidence is limited to the CVE/VulDB description and related public research references. The affected function is unnamed beyond the Letter Trigram Handler. No vendor patch, active exploitation, or enterprise-scale attack path is established in the supplied sources.
Mitigation direction
- Check Nintendo or trusted maintainer guidance; no patch is named in the bundle.
- Do not accept untrusted save, memory-card, or letter data for affected titles.
- Isolate preservation or emulator analysis systems from sensitive networks.
- Keep known-good backups before handling third-party game data.
- Treat public exploit repositories as research material, not validation tooling.
Validation and detection
- Inventory whether affected titles and versions 1.00 or 1.01 are present.
- Confirm whether workflows process Animal Crossing letter or trigram-related data.
- Review labs, exhibits, or events for untrusted memory-card handling.
- Check whether emulator or preservation tooling imports third-party game artifacts.
- Document compensating controls where affected physical media cannot be removed.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-119: Exact CWE lookup
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Open ATT&CK lookupCVE-2018-25109 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H0.55.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- VDB-300631 | Nintendo Animal Crossing Letter Trigram ac-exploit-gc memory corruptionCVE reference · vdb-entry
- VDB-300631 | CTI Indicators (IOB, IOC)CVE reference · signature, permissions-required
- https://jamchamb.net/2018/07/11/animal-crossing-nes-emulator-hacks.htmlCVE reference · related
- https://hunter-r.com/posts/ac-trigrams/CVE reference · related
- https://github.com/FIX94/ac-exploit-gcCVE reference · exploit
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.