CVE-2025-66037

MEDIUM EPSS 16.5%
Published Mar 30, 20263mo ago · Modified Jun 17, 20261w ago
6.8 CVSS 3.1
Medium
Find Similar
Published Mar 30, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
6.8
Exploitability
0.9
Impact
5.9
Vector string
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Physical
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
16.5% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 1

VendorProductVersionRange
opensc_projectopensc* <0.27.0

References 2

  • github.com https://github.com/OpenSC/OpenSC/security/advisories/GHSA-m58q-rmjm-mmfx
    ExploitVendor Advisory
  • github.com https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66037
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.