Answer in brief
CVE-2025-15556 records a High severity vulnerability in Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification. The current sources mark it as known exploited. The current feed maps notepad-plus-plus/notepad-plus-plus (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2025-15556 records a High severity vulnerability in Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification. The current sources mark it as known exploited. The current feed maps notepad-plus-plus/notepad-plus-plus (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps notepad-plus-plus/notepad-plus-plus (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| notepad-plus-plus/notepad-plus-plusgeneric | >=0 <8.8.9 | 8.8.9 |
Published upstream
Feb 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Mar 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Feb 12, 2026
Evidence: source:kev:kev:kev:recordNotepad++ 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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps notepad-plus-plus/notepad-plus-plus (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| notepad-plus-plus/notepad-plus-plusgeneric | >=0 <8.8.9 | 8.8.9 |
Published upstream
Feb 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Mar 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Feb 12, 2026
Evidence: source:kev:kev:kev:recordNotepad++ 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.
Quoted source text, attributed separately from HOL analysis.