CVE-2025-15556 (GCVE-0-2025-15556)

Vulnerability from cvelistv5 – Published: 2026-02-03 00:50 – Updated: 2026-02-13 04:56 X_Known Exploited Vulnerability
VLAI?
Title
Notepad++ < 8.8.9 WinGUp Updater Lacks Update Integrity Verification
Summary
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 ?
7.7 (High)
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
CWE
  • CWE-494 - Download of Code Without Integrity Check
Assigner
References
Impacted products
Vendor Product Version
notepad-plus-plus notepad-plus-plus Affected: 0 , < 8.8.9 (semver)
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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.