CVE-2025-5555
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.
SeverityHigh
CVSS7.8
Exploit probability—
ProductPORT IO Driver
PublishedOct 18, 2025
First seenOct 18, 2025
Weakness typeCWE-121CWE-121CWE-119Memory buffer bounds error
How to fix
Patches
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Nixdorf Wincor PORT IO Driver | 1.0.0.0, 1.0.0.1 | — |
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