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CVE-2025-15556

HIGHCISA KEV

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionREQUIRED

Published2/3/2026

Last Modified2/13/2026

Sourcekev

Honeypot Sightings0

CISA KEV

VendorNotepad++

ProductNotepad++

Vulnerability NameNotepad++ Download of Code Without Integrity Check Vulnerability

KEV Date Added2026-02-12

Remediation Due Date2026-03-05

Ransomware UseUnknown

Affected Products

notepad-plus-plus:notepad\+\+

Weaknesses (CWE)

CWE-494

References

https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix(disclosure@vulncheck.com)

https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5ab(disclosure@vulncheck.com)

https://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdb(disclosure@vulncheck.com)

https://notepad-plus-plus.org/news/hijacked-incident-info-update/(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification(disclosure@vulncheck.com)

https://notepad-plus-plus.org//news//clarification-security-incident/(134c704f-9b21-4f2e-91b3-4a467353bcc0)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.