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CVE-2025-66215

OpenSC: Stack-buffer-overflow WRITE in card-oberthur

Published: Mar 30, 2026Updated: Apr 1, 2026 Sources: CVE List NVDCWE-121
NVD MITRE
3.8CVSSLOW
EPSS Score
0.2%
Top 94.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, an attacker with physical access to the computer at the time user or administrator uses a token can cause a stack-buffer-overflow WRITE in card-oberthur. The attack requires crafted USB device or smart card that would present the system with specially crafted responses to the APDUs. This issue has been patched in version 0.27.0.

CVSS Vector Breakdown

AV:PAC:HPR:NUI:RS:UC:LI:LA:L
Exploitability
AV:PAttack Vector
Physical
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-121

Affected Products

OpenSCOpenSC
Library
Security Products / pki-crypto
openscopensc project
Library
OSS Libraries / generic-library
openscoss-projectSecurity Products
opensc projectoss-projectOSS Librariesaka opensc, opensc project

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/OpenSC/OpenSC/security/advisories/GHSA-q5fc-cw56-hwp2
github.com
https://github.com/OpenSC/OpenSC/pull/3436
github.com
https://github.com/OpenSC/OpenSC/commit/efd1d479832141bcf705c2f47655ada4d5f92f5d
github.com
and 1 more references View all →

Timeline

Published
Mar 30, 2026
Last Updated
Apr 1, 2026

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