Vulnerability Analysis
Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification
CVE-2025-15556
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.
CISA KEV
CVSS Base Score
7.7
HIGH
Exploitability:-
Impact Score:-
Temporal Score:-
EPSS:1.27%
Threat Intelligence Signals
CISA KEV
YES
KEV Date Added
2026-02-12
Ransomware Use
Unknown
KEV Due Date
2026-03-05
VulnCheck In-the-Wild
No
Nuclei Template
No
EPSS Score
1.268%
EPSS Percentile
66.0th pct
GHSA ID
GitHub Severity
HIGH
SSVC Exploitation
—
SSVC Automatable
—
Vulnerability Class
—
Identity & Timeline
| Status | - |
| Assigning Authority | - |
| CVSS Version / Source | - |
| Reserved | - |
| Published | - |
| Patch Date (date_public) | - |
| Exploit DB Date | - |
| First GitHub PoC Date | - |
| Last Updated | - |
| Time to Patch (Days to fix) | - |
| Exploit Release Gap | - |
| PoC Release Gap | - |
| Exploit DB References | None identified |
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| No affected products specified. | ||
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