CVE-2025-66215

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

CVSS 3.8 LOWEPSS 0.2%CWE-121

Vexday Risk Score

8Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 3.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

30 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

Affected products

OpenSC · OpenSC

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References

https://github.com/OpenSC/OpenSC/commit/efd1d479832141bcf705c2f47655ada4d5f92f5d https://github.com/OpenSC/OpenSC/pull/3436 https://github.com/OpenSC/OpenSC/security/advisories/GHSA-q5fc-cw56-hwp2 https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66215