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CVE-2026-40510
OpenSC before 0.27.0-rc1, fixed in commit 3f24f0b, contains a stack buffer overflow vulnerability in piv_process_history() in src/libopensc/card-piv.c that allows physically present attackers to trigger memory corruption by presenting a crafted PIV smart card or USB device returning a URL field longer than 118 bytes in the Key History Object ASN.1 response.
This record: live connection— last retrieved: 7 November 2026 at 02:05.
Vendor
Published
29 May 2026
Last modified
21 July 2026
Taken directly from NVD, CISA or the vendor — sometimes in English, unchanged from the source.
OpenSC before 0.27.0-rc1, fixed in commit 3f24f0b, contains a stack buffer overflow vulnerability in piv_process_history() in src/libopensc/card-piv.c that allows physically present attackers to trigger memory corruption by presenting a crafted PIV smart card or USB device returning a URL field longer than 118 bytes in the Key History Object ASN.1 response.
CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Attack vector
PHYSICAL
Privileges required
NONE
User interaction
REQUIRED
Confidentiality
Limited
Integrity
Limited
Availability
Limited
Probability of exploitation within 30 days
0.3%
Percentile
22e
Source: FIRST.org, updated on 6 November 2026.
Exploitation requires physical access. Restrict physical access to the device and to its USB and smart-card interfaces, and do not connect untrusted PIV smart cards or CCID/USB devices.
Our own interpretation and context for the source data above.
IACS Radar assessment
Our own interpretation and context for this vulnerability — not an official source.
IACS Radar priority score
Based on CVSS 3.8, EPSS 0.3%, industrial relevance 40/100.
Combines CVSS, EPSS, KEV status, industrial relevance and exposure relevance — a complement to, not a replacement for, the individual scores below and above.
Conditions for exploitation
Operational impact & energy relevance
Limited impact on availability; the risk lies mainly with confidentiality or integrity of process data.
No strong energy-sector-specific signals recognised; general OT/ICS relevance.
Recommended defensive measures
Industrial relevance score
Classification is provisional; manual verification by an OT security analyst is recommended.
Classified by IACS Radar-analysepijplijn (geautomatiseerd) on 7 November 2026.
IEC 62443 mapping
Automatic IACS Radar assessment based on the reported CWE weakness classification; not an official certification statement.