Subtitle Processor 7.7.1 .m3u SEH Unicode Buffer Overflow

published 2025-08-20 14 mo ago modified 2026-06-16 4 mo ago also EUVD-2011-5249

cvss: 8.5; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits: 1; Metasploit

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.

Timeline

2011-04-26 First public exploit (Metasploit exploit/windows/fileformat/subtitle_processor_m3u_bof)
2025-08-20 Published

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 14 mo ago (2025-08-20)

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

Metasploit exploit/windows/fileformat/subtitle_processor_m3u_bof Subtitle Processor 7.7.1 .M3U SEH Unicode Buffer Overflow metasploit exploit, normal rank, 2011-04-26
raw.githubusercontent.com https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/fileformat/subtitle_processor_m3u_bof.rb referenced PoC, tagged "exploit" by a source, unverified
exploit-db.com https://www.exploit-db.com/exploits/17217 referenced PoC, tagged "exploit" by a source, unverified
exploit-db.com https://www.exploit-db.com/exploits/17225 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	8.5	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
CNA	4.0	8.5	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Subtitle Processor Subtitle Processor

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

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

Sources

CVE List CVE-2011-10025
NVD CVE-2011-10025

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary