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.
References (4)
Core 4
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/OpenSC/OpenSC/security/advisories/GHSA-q5fc-cw56-hwp2
X_Refsource_Misc x_refsource_misc
https://github.com/OpenSC/OpenSC/pull/3436
X_Refsource_Misc x_refsource_misc
https://github.com/OpenSC/OpenSC/commit/efd1d479832141bcf705c2f47655ada4d5f92f5d
X_Refsource_Misc x_refsource_misc
https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66215
Scores
CVSS v3
3.8
EPSS
0.0016
EPSS Percentile
5.4%
Attack Vector
PHYSICAL
CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-121
Status
published
Products (2)
OpenSC/OpenSC
< 0.27.0
opensc_project/opensc
< 0.27.0
Published
Mar 30, 2026
Tracked Since
Mar 30, 2026