CVE-2025-66037
OpenSC: Out of Bounds vulnerability
Vexday Risk Score
8Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 3.9EPSS 0.3%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, feeding a crafted input to the fuzz_pkcs15_reader harness causes OpenSC to perform an out-of-bounds heap read in the X.509/SPKI handling path. Specifically, sc_pkcs15_pubkey_from_spki_fields() allocates a zero-length buffer and then reads one byte past the end of that allocation. This issue has been patched in version 0.27.0.
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected products
OpenSC · OpenSCWant to know if your infrastructure is exposed to this?
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