EUVD-2026-33563
GHSA-h6wx-qjrr-x3rf
Severity by source
CVSS: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
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS: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
Lifecycle Timeline
3DescriptionCVE.org
A vulnerability was identified in Assimp up to 6.0.4. This impacts the function Assimp::MDL::HalfLife::HL1MDLLoader::read_animations of the file HL1MDLLoader.cpp of the component Half-Life 1 MDL Loader. Such manipulation leads to heap-based buffer overflow. The attack must be carried out locally. The exploit is publicly available and might be used. The project tagged the reported issue as bug.
AnalysisAI
Heap-based buffer overflow in Assimp's Half-Life 1 MDL Loader (versions up to 6.0.4) allows a locally authenticated attacker with low privileges to corrupt heap memory via a crafted MDL animation file, producing low-severity but confirmed confidentiality, integrity, and availability impact. The vulnerability resides in the read_animations function of HL1MDLLoader.cpp and is reproducible with publicly available exploit code (POC). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Local access with a low-privilege authenticated account is required (CVSS AV:L/PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 5.3 Medium with AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L reflects a local attack surface with low complexity and privileges, no user interaction, and bounded low-impact across all three CIA pillars - the scope does not change, meaning privilege escalation beyond the vulnerable process is not directly indicated. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with local low-privilege access on a system running an application that uses Assimp (e.g., a 3D modeling tool, game engine, or file conversion utility) supplies a specially crafted Half-Life 1 MDL file containing malicious animation data. When the application parses the file using the HL1MDLLoader, the read_animations function writes beyond a heap buffer boundary, corrupting adjacent memory. … |
| Remediation | No vendor-released patched version has been independently confirmed at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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