CVE-2025-15556 - Notepad++ Notepad++
AI Vulnerability ContextNotepad++ 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.
Overview
A source-backed snapshot of this vulnerability.
CISA KEVyesWhether CISA lists this as exploited.
Techniques0AI attack methods connected to this vulnerability.
Case studies0Examples where this vulnerability is mentioned.
Vulnerability status
How serious this vulnerability is and whether it is known to be exploited.
CISA KEVHIGH
- CVE ID
- CVE-2025-15556
- Vendor/project
- Notepad++
- Product
- Notepad++
- Vulnerability name
- Notepad++ Download of Code Without Integrity Check Vulnerability
- Date added
- 2026-02-12
- Due date
- 2026-03-05
- Known ransomware campaign use
- Unknown
- CVSS v3
- 7.5
- CVSS v4
- 7.7
CWE-494
Exploit context
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No description available. The source record only contains identifiers and metadata.
Source evidence
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Original source
Original source links
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NVD CVE pagehttps://nvd.nist.gov/vuln/detail/CVE-2025-15556CVE API docshttps://nvd.nist.gov/developers/vulnerabilitiesData feedshttps://nvd.nist.gov/vuln/data-feedsCataloghttps://www.cisa.gov/known-exploited-vulnerabilities-catalogData repositoryhttps://github.com/cisagov/kev-datadisclosure@vulncheck.comhttps://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fixdisclosure@vulncheck.comhttps://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5abdisclosure@vulncheck.comhttps://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdbdisclosure@vulncheck.comhttps://notepad-plus-plus.org/news/hijacked-incident-info-update/disclosure@vulncheck.comhttps://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification134c704f-9b21-4f2e-91b3-4a467353bcc0https://notepad-plus-plus.org//news//clarification-security-incident/134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556