CVE-2025-15556: Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification
In CISA’s Known Exploited Vulnerabilities catalog: Notepad++ Download of Code Without Integrity Check Vulnerability.
Added , federal remediation due . Known ransomware use: Unknown.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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.
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H · CWE-494
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
notepad-plus-plus: notepad-plus-plus
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix (opens in new tab)
- github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e05… (opens in new tab)
- github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614… (opens in new tab)
- notepad-plus-plus.org/news/hijacked-incident-info-update/ (opens in new tab)
- www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-ve… (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)