CVE-2025-49010

OpenSC: Stack-buffer-overflow WRITE in GET RESPONSE

MEDIUM
6.8
CVSS Score
Published: March 30, 2026 at 04:59 PM UTC
Updated: June 17, 2026 at 09:30 AM UTC
1 product affected across 1 vendorOpenSC

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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 GET RESPONSE. 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.27.0
Affected range stops below 0.27.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/OpenSC/OpenSC/security/advisories/GHSA-q5cf-5wmx-9wh4
x_refsource_MISCVendor Advisory
Source: cverecord
https://github.com/OpenSC/OpenSC/wiki/CVE-2025-49010

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
PHYSICAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-121

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