CVE-2025-15556HIGH 7.5CISA KEVEPSS p66.0%

CVE-2025-15556Notepad++ Download of Code Without Integrity Check Vulnerability

Notepad++ / Notepad++

Description

Notepad++ when using the WinGUp updater, contains a download of code without integrity check vulnerability that could allow an attacker to intercept or redirect update traffic to download and execute an attacker-controlled installer. This could lead to arbitrary code execution with the privileges of the user.

Scoring

CVSS 3.17.5 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS1.27% probability of exploitation · percentile 66.0% · 2026-06-18T12:00:27Z
Published2026-02-03
Last modified2026-02-13

CISA KEV entry

Added to KEV: 2026-02-12

Underlying weaknesses· 1

CWE-494

References

  1. https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix
  2. https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5ab
  3. https://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdb
  4. https://notepad-plus-plus.org/news/hijacked-incident-info-update/
  5. https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification
  6. https://notepad-plus-plus.org//news//clarification-security-incident/
  7. https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556

1

TypeTargetConfidenceTier
WeaknessDownload of Code Without Integrity Checkcwe-4940%live

(incoming)1

TypeTargetConfidenceTier
KEVEntryNotepad++ Download of Code Without Integrity Check Vulnerabilitykev-cve-2025-155560%live

Related by meaning· 6

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.