VDB-329013 · CVE-2025-5555 · Submit #329013

Nixdorf Wincor PORT IO Driver up to 1.0.0.1 IOCTL wnport.sys sub_11100 stack-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Nixdorf Wincor PORT IO Driver up to 1.0.0.1. This vulnerability affects the function sub_11100 in the library wnport.sys of the component IOCTL Handler. Performing a manipulation results in stack-based overflow. This vulnerability was named CVE-2025-5555. The attack needs to be approached locally. In addition, an exploit is available. It is recommended to upgrade the affected component. The vendor was contacted beforehand and was able to provide a patch very early.

Detailsinfo

A vulnerability classified as critical 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. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at b.iakb.org. This vulnerability is uniquely identified as CVE-2025-5555. The exploitability is told to be easy. An attack has to be approached locally. Technical details and a public exploit are known.

The exploit is shared for download at b.iakb.org. It is declared as proof-of-concept. The vendor was contacted beforehand and was able to provide a patch very early.

Upgrading to version 3.0.0.1 eliminates this vulnerability. The upgrade is hosted for download at download.dieboldnixdorf.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-34989). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Hardware Driver Software

Vendor

Nixdorf Wincor

Name

PORT IO Driver

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.8
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: PORT IO Driver 3.0.0.1

Timelineinfo

10/18/2025 Advisory disclosed
10/18/2025 +0 days VulDB entry created
10/18/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: b.iakb.org
Status: Confirmed

CVE: CVE-2025-5555 (🔒)
GCVE (CVE): GCVE-0-2025-5555
GCVE (VulDB): GCVE-100-329013
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/18/2025 09:54
Updated: 10/18/2025 12:36
Changes: 10/18/2025 09:54 (61), 10/18/2025 12:20 (30), 10/18/2025 12:36 (1)
Complete: 🔍
Submitter: rickqwq
Cache ID: 216:645:103

Submitinfo

Accepted

Submit #604823: Wincor Nixdorf Wincor Nixdorf PORT IO Driver <=1.0.0.1 Buffer Overflow (by rickqwq)

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