Buffer overflow in Opensc
CVE-2025-66215
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. Th…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (5.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L.
Affected products
- Opensc — versions < 0.27.0
Weakness classification (CWE)
References
- https://github.com/OpenSC/OpenSC/security/advisories/GHSA-q5fc-cw56-hwp2 (x_refsource_CONFIRM)
- https://github.com/OpenSC/OpenSC/pull/3436 (x_refsource_MISC)
- https://github.com/OpenSC/OpenSC/commit/efd1d479832141bcf705c2f47655ada4d5f92f5d (x_refsource_MISC)
- https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66215 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-66215?
- CVE-2025-66215 is a low-severity vulnerability in Opensc, classified under Stack-based Buffer Overflow. CVSS score: 3.8/10. Published 2026-03-30.
- How severe is CVE-2025-66215?
- Low severity. CVSS v3 base score is 3.8 out of 10.