Staging Environment: Content and features may be unstable or change without notice.
Advisory details: pypa / pyassimp/PYSEC-2025-164
Advisory ID pypa/pyassimp/PYSEC-2025-164
Aliases CVE-2025-2753
PYSEC-2025-164
Summary A vulnerability was found in Open Asset Import Library Assimp 5.4.3. It has been classified as critical. Affected is the function SceneCombiner::MergeScenes of the file code/AssetLib/LWS/LWSLoader.cpp of the component LWS File Handler. The manipulation leads to out-of-bounds read. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
Status Published
Exploitability 0.5
Weighted Severity 7.9
Risk 4.0
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 8.8 https://github.com/pypa/advisory-database/blob/main/vulns/pyassimp/PYSEC-2025-164.yaml
Reference id Reference type URL
6014 Bug https://github.com/assimp/assimp/issues/6014
6014#issue-2877372462 Bug https://github.com/assimp/assimp/issues/6014#issue-2877372462
?ctiid.300858 Other https://vuldb.com/?ctiid.300858
?id.300858 Advisory https://vuldb.com/?id.300858
?submit.517787 Advisory https://vuldb.com/?submit.517787
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://github.com/pypa/advisory-database/blob/main/vulns/pyassimp/PYSEC-2025-164.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/2025-03-25T13:14:44Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2025/2xxx/CVE-2025-2753.json

Source Advisory: vulnrichment/CVE-2025-2753

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