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.

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Local

Access Complexity Low

Authentication Single

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Dieboldnixdorf
  • Wincor

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References
Link Providers
https://b.iakb.org/2025/06/26/Wincor-Nixdorf-PORT-IO-Driver-Buffer-Overflow/ cve-icon cve-icon
https://download.dieboldnixdorf.com/ cve-icon cve-icon
https://vuldb.com/?ctiid.329013 cve-icon cve-icon
https://vuldb.com/?id.329013 cve-icon cve-icon
https://vuldb.com/?submit.604823 cve-icon cve-icon
History

Mon, 20 Oct 2025 20:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Mon, 20 Oct 2025 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Dieboldnixdorf
Dieboldnixdorf wincor
Vendors & Products Dieboldnixdorf
Dieboldnixdorf wincor

Sat, 18 Oct 2025 08:15:00 +0000

Type Values Removed Values Added
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.
Title Nixdorf Wincor PORT IO Driver IOCTL wnport.sys sub_11100 stack-based overflow
Weaknesses CWE-119
CWE-121
References
Metrics cvssV2_0

{'score': 6.8, 'vector': 'AV:L/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 7.8, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 7.8, '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'}

cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2025-10-20T17:35:33.229Z

Reserved: 2025-06-03T16:48:09.362Z

Link: CVE-2025-5555

cve-icon Vulnrichment

Updated: 2025-10-20T17:35:19.968Z

cve-icon NVD

Status : Received

Published: 2025-10-18T08:15:34.460

Modified: 2025-10-18T08:15:34.460

Link: CVE-2025-5555

cve-icon Redhat

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