CVE-2025-5200Public exploit

Process crash via unchecked MDL frame bounds

Published May 26, 2025 · Updated May 28, 2025

Out-of-bounds read in Assimp 5.4.3 allows local users to crash an importing process by supplying a malformed Quake 1 MDL file. MDLImporter::InternReadFile_Quake1 dereferences frame metadata and calculates a grouped-frame pointer before validating that the input contains those structures. The vulnerable process must import the crafted file; published sanitizer runs terminate on the invalid heap read, causing a process crash.

CVSS severity4.8
Medium
EPSS probability0.27%
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 Assimp 5.4.3 allows local users to crash an importing process by supplying a malformed Quake 1 MDL file. MDLImporter::InternReadFile_Quake1 dereferences frame metadata and calculates a grouped-frame pointer before validating that the input contains those structures. The vulnerable process must import the crafted file; published sanitizer runs terminate on the invalid heap read, causing a process crash.

The record

CVE
CVE-2025-5200
Published
May 26, 2025
Updated
May 28, 2025
Vendor
Open Asset Import Library
Product
Assimp
Classifications
CWE-119, CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 28, 2025Record 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=5.4.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Open Asset Import Library · Assimpversion=5.4.3

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P
3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.8VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-125Out-of-bounds Read

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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