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I. Basic Information for CVE-2025-15556
Vulnerability Information
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Vulnerability Title
Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
下载代码缺少完整性检查
Source: NVD (National Vulnerability Database)
Vulnerability Title
Notepad++ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Notepad++是中国台湾侯今吾（Don Ho）个人开发者的一款开源的纯文本编辑器。 Notepad++ 8.8.9之前版本存在安全漏洞，该漏洞源于使用WinGUp更新器时更新完整性验证不足，可能导致执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
notepad-plus-plusnotepad-plus-plus 0 ~ 8.8.9 -
II. Public POCs for CVE-2025-15556
#POC DescriptionSource LinkShenlong Link
1IoCs and detection rules for the Notepad++ supply chain attack (CVE-2025-15556) — Lotus Blossom APT, June–December 2025. Includes Falcon LogScale queries, YARA/Sigma rules, and MITRE ATT&CK mapping.https://github.com/renat0z3r0/notepadpp-supply-chain-iocsPOC Details
2Nonehttps://github.com/George0Papasotiriou/CVE-2025-15556-Notepad-WinGUp-Updater-RCEPOC Details
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III. Intelligence Information for CVE-2025-15556
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IV. Related Vulnerabilities
Same product: notepad-plus-plus
Same vendor: notepad-plus-plus
Same weakness: CWE-494
V. Comments for CVE-2025-15556

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