Staging Environment: Content and features may be unstable or change without notice.
Advisory details: pypa / pyassimp/PYSEC-2025-159
Advisory ID pypa/pyassimp/PYSEC-2025-159
Aliases CVE-2025-2152
PYSEC-2025-159
Summary A vulnerability, which was classified as critical, has been found in Open Asset Import Library Assimp 5.4.3. This issue affects the function Assimp::BaseImporter::ConvertToUTF8 of the file BaseImporter.cpp of the component File Handler. The manipulation leads to heap-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
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 9.8 https://github.com/pypa/advisory-database/blob/main/vulns/pyassimp/PYSEC-2025-159.yaml
Reference id Reference type URL
6027 Bug https://github.com/assimp/assimp/issues/6027
6027#issue-2877629241 Bug https://github.com/assimp/assimp/issues/6027#issue-2877629241
?ctiid.299063 Other https://vuldb.com/?ctiid.299063
?id.299063 Advisory https://vuldb.com/?id.299063
?submit.510818 Advisory https://vuldb.com/?submit.510818
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:N/S:U/C:H/I:H/A:H Found at https://github.com/pypa/advisory-database/blob/main/vulns/pyassimp/PYSEC-2025-159.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/2025-03-10T14:23:55Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2025/2xxx/CVE-2025-2152.json

Source Advisory: vulnrichment/CVE-2025-2152

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