Description

Notepad++ versions prior to 8.8.9, when using the WinGUp updater, contain an update integrity verification vulnerability where downloaded update metadata and installers are not cryptographically verified. An attacker able to intercept or redirect update traffic can cause the updater to download and execute an attacker-controlled installer, resulting in arbitrary code execution with the privileges of the user.

INFO

Published Date :

2026-02-03T00:50:29.516Z

Last Modified :

2026-03-05T01:29:51.538Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2025-15556 vulnerability.

Vendors Products
Notepad++
  • Notepad++
Notepad-plus-plus
  • Notepad++
  • Notepad\+\+
Notepad Plus Plus
  • Notepad++
  • Notepad\+\+
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-15556.

URL Resource
https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix cve-icon cve-icon
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5ab cve-icon cve-icon
https://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdb cve-icon cve-icon
https://notepad-plus-plus.org//news//clarification-security-incident/ cve-icon cve-icon
https://notepad-plus-plus.org/news/hijacked-incident-info-update/ cve-icon cve-icon
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556 cve-icon cve-icon
https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact