CVE-2021-41457Public exploitNetwork attack vector

Application crash via unchecked NHML path copy

Published Oct 1, 2021 · Updated Aug 4, 2024

Stack-buffer overflow in MP4Box 1.1.0 allows attackers to crash the application when it imports NHML from an overlong path. nhmldmx_init_parsing passes the absolute input path to strcpy without checking whether the fixed-size stack destination can hold it. Triggering the fault requires MP4Box to add an NHML input whose absolute path exceeds that buffer; the demonstrated consequence is a process crash.

CVSS severity7.5
High
EPSS probability1.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-buffer overflow in MP4Box 1.1.0 allows attackers to crash the application when it imports NHML from an overlong path. nhmldmx_init_parsing passes the absolute input path to strcpy without checking whether the fixed-size stack destination can hold it. Triggering the fault requires MP4Box to add an NHML input whose absolute path exceeds that buffer; the demonstrated consequence is a process crash.

The record

CVE
CVE-2021-41457
Published
Oct 1, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

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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