ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-5555

A vulnerability has been found in Nixdorf Wincor PORT IO Driver up to 1.0.0.1.

Published Oct 18, 2025 · catalog updated Oct 20, 2025 · Nixdorf Wincor PORT IO Driver

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-5555. EPSS is 0.23%. Act only if a listed version of Nixdorf Wincor PORT IO Driver is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.23%
Remediation
Vendor / distro source
Affected products
vendor Nixdorf Wincor PORT IO Driver 1.0.0.0

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Nixdorf Wincor PORT IO Driver 1.0.0.01.0.0.0

How to fix CVE-2025-5555

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-5555. EPSS is 0.23%. Act only if a listed version of Nixdorf Wincor PORT IO Driver is installed.

Which versions are affected?

Compare what you have installed with Nixdorf Wincor PORT IO Driver 1.0.0.0 1.0.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 18, 2025 · EUVD

    Detected

    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

  2. Oct 20, 2025 · EUVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2025-5555

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-5555

    30-day exploitation probability 0.23%

    first.org
  • EUVDVulnerability recordEUVD-2025-34989

    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. T

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026