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CVE-2025-5555

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CVE-2025-5555

Published: Oct 18, 2025

Modified: Oct 20, 2025

PUBLISHED

CVSS v3.1

7.8

HIGH

Description

A vulnerability has been found in Nixdorf Wincor PORT IO Driver up to 1.0.0.1. This affects the function sub_11100 in the library wnport.sys of the component IOCTL Handler. Such manipulation leads to stack-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. Upgrading to version 3.0.0.1 is able to mitigate this issue. Upgrading the affected component is recommended. The vendor was contacted beforehand and was able to provide a patch very early.

VendorProductVersions

Nixdorf Wincor

PORT IO Driver

affected
1.0.0.0
affected
1.0.0.1
unaffected
3.0.0.1

Weaknesses (CWE)

CWE-121
CWE-119

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

VDB-329013 | CTI Indicators (IOB, IOC, IOA)
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