CVE-2025-3549Public exploit

Application crash via invalid MD3 surface pointer

Published Apr 14, 2025 · Updated Jul 23, 2025

Heap-based buffer overflow in Assimp 5.4.3 allows local users to crash importing applications via a malformed MD3 file. MD3Importer::ValidateSurfaceHeaderOffsets dereferences attacker-controlled surface-header fields before establishing that the surface pointer and offset calculations remain within the input buffer. A local user must cause an Assimp-consuming process to load the file; the demonstrated consequence is an out-of-bounds read and application crash.

CVSS severity3.3
Low
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Assimp 5.4.3 allows local users to crash importing applications via a malformed MD3 file. MD3Importer::ValidateSurfaceHeaderOffsets dereferences attacker-controlled surface-header fields before establishing that the surface pointer and offset calculations remain within the input buffer. A local user must cause an Assimp-consuming process to load the file; the demonstrated consequence is an out-of-bounds read and application crash.

The record

CVE
CVE-2025-3549
Published
Apr 14, 2025
Updated
Jul 23, 2025
Vendor
Open Asset Import Library
Product
Assimp
Classifications
CWE-119, CWE-122
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 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

5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
3.3NISTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.3VulDBAV:L/AC:L/Au:S/C:P/I:P/A:P
1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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

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 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-122Heap-based Buffer Overflow

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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