CVE-2025-51602Network attack vector

Crash via malformed MMS server response

Published Jan 16, 2026 · Updated Jan 16, 2026

Out-of-bounds read in mmstu.c in VideoLAN VLC media player before 3.0.22 allows remote attackers to crash VLC via an MMS server response. The MMS transport parser handles a crafted response with type 0x01 and reads beyond the response buffer; public sources do not identify the exact missing bounds check. Exploitation requires VLC to connect to an attacker-controlled MMS server or open a stream that reaches one, and the documented outcome is an application crash.

CVSS severity4.8
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in mmstu.c in VideoLAN VLC media player before 3.0.22 allows remote attackers to crash VLC via an MMS server response. The MMS transport parser handles a crafted response with type 0x01 and reads beyond the response buffer; public sources do not identify the exact missing bounds check. Exploitation requires VLC to connect to an attacker-controlled MMS server or open a stream that reaches one, and the documented outcome is an application crash.

The record

CVE
CVE-2025-51602
Published
Jan 16, 2026
Updated
Jan 16, 2026
Vendor
VideoLAN
Product
VLC media player
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.0.22

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

VideoLAN · VLC media playerversion=0 <3.0.22

Published CVSS scores

4.8MITRECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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