CVE-2014-9626

Crash via undersized MP4 string box

Published Jan 24, 2020 · Updated Aug 6, 2024

Integer underflow in VLC media player before 2.1.6 allows remote attackers to crash VLC through a crafted MP4 string box. MP4_ReadBox_String subtracts eight from an attacker-controlled box size without rejecting smaller values, then passes the wrapped length to malloc and memcpy, causing a heap buffer overflow. Triggering requires a user to explicitly open the crafted file or stream; a crash was demonstrated, while code execution was assessed as feasible but not demonstrated.

CVSS severity7.8
High
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in VLC media player before 2.1.6 allows remote attackers to crash VLC through a crafted MP4 string box. MP4_ReadBox_String subtracts eight from an attacker-controlled box size without rejecting smaller values, then passes the wrapped length to malloc and memcpy, causing a heap buffer overflow. Triggering requires a user to explicitly open the crafted file or stream; a crash was demonstrated, while code execution was assessed as feasible but not demonstrated.

The record

CVE
CVE-2014-9626
Published
Jan 24, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-191, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 24, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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