Staging Environment: Content and features may be unstable or change without notice.
Advisory details: pypa / pyassimp/PYSEC-2025-172
Advisory ID pypa/pyassimp/PYSEC-2025-172
Aliases CVE-2025-5165
PYSEC-2025-172
Summary A vulnerability was found in Open Asset Import Library Assimp 5.4.3 and classified as problematic. This issue affects the function MDCImporter::ValidateSurfaceHeader of the file assimp/code/AssetLib/MDC/MDCLoader.cpp. The manipulation of the argument pcSurface2 leads to out-of-bounds read. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future.
Status Published
Exploitability 0.5
Weighted Severity 5.0
Risk 2.5
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv3.1 5.5 https://github.com/pypa/advisory-database/blob/main/vulns/pyassimp/PYSEC-2025-172.yaml
Reference id Reference type URL
6128 Bug https://github.com/assimp/assimp/issues/6128
6167 Bug https://github.com/assimp/assimp/issues/6167
?ctiid.310253 Other https://vuldb.com/?ctiid.310253
?id.310253 Advisory https://vuldb.com/?id.310253
reproducer.zip Exploit https://github.com/user-attachments/files/20204942/reproducer.zip
?submit.578000 Advisory https://vuldb.com/?submit.578000
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/pypa/advisory-database/blob/main/vulns/pyassimp/PYSEC-2025-172.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-05-27T14:20:03Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2025/5xxx/CVE-2025-5165.json

Source Advisory: vulnrichment/CVE-2025-5165

View SSVC decision tree 
[{'Exploitation': 'poc'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]