Dashboard / CVE-2026-121941

CVE-2026-121941

HIGH
MEDIUM Priority: 0.02 BB Relevance: 42/100
Published: 2026-11-04 Modified: 2026-11-12 First seen: 2026-11-04 Status: active

Attack Surface

Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Passive
S: X
AT: None
VC: High
VI: High
VA: High

Description

libmt32emu before 2.8.4 contains a heap buffer overflow vulnerability in MidiStreamParserImpl::parseSysex that allows attackers to write past a heap allocation by supplying oversized unterminated SysEx messages. Attackers can feed more than 32768 SysEx data bytes through the mt32emu_parse_stream API via MIDI files, ports, or sequencer clients to corrupt heap memory and crash the application.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
munt libmt32emu 0 < 2.8.4
munt libmt32emu 0 < 2.8.4

References & Advisories (6)

Bug Bounty Relevance

42 / 100
✓ No authentication
✓ Low complexity

CVSS Score

8.5 / 10.0 v4.0
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

EPSS — Exploitation Probability

0.26%
Raw Score 0.002600
Percentile 17.9%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00260
2026-11-13
0.00260
2026-11-12
0.00260
2026-11-10
0.00260
2026-11-09
0.00260
2026-11-08
0.00260
2026-11-07
0.00260
2026-11-06
0.00260
2026-11-05
0.00260

Intelligence Sources

mitre ref →
nvd ref →

External Links