VULNERABILITY INTELLIGENCE

CVE-2026-48770

CVSS score5 MEDIUM
EPSS probability0.14%
CISA KEVNot currently listed
Published2026-06-26
Last modified2026-06-29
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

Description

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, a local process in the same interactive Windows session can send a malformed WM_COPYDATA message to Notepad++ using the COPYDATA_FULL_CMDLINE path. The handler appears to process COPYDATASTRUCT.lpData as an unbounded NUL-terminated wchar_t* instead of enforcing COPYDATASTRUCT.cbData. This vulnerability is fixed in 8.9.6.1.

Weakness classification

  • CWE-125: Out-of-bounds Read

Primary references