AEGLIX vulnerability intelligence
CVE-2025-15556
HIGH · CVSS 7.7 · Analyzed
Published: 2026-02-03 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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.
Severity and scoring
- CVSS score
- 7.7 · HIGH
- CVSS version
- 4.0
- CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-494
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Notepad++ · Notepad++
- Added to catalog
- 2026-02-12
- 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.
- CISA remediation due date
- 2026-03-05
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:notepad-plus-plus:notepad\+\+:*:*:*:*:*:*:*:*
Before (exclusive): 8.8.9
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix
Release Notes
- https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5ab
Patch
- https://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdb
Patch
- https://notepad-plus-plus.org/news/hijacked-incident-info-update/
Patch · Vendor Advisory
- https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verification
Third Party Advisory
- https://notepad-plus-plus.org//news//clarification-security-incident/
Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556
US Government Resource