CVE-2026-48770 (GCVE-0-2026-48770)

Vulnerability from cvelistv5 – Published: 2026-06-26 20:22 – Updated: 2026-06-29 12:11
VLAI
Title
Notepad++ WM_COPYDATA COPYDATA_FULL_CMDLINE local DoS crash
Summary
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.
Severity
5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 12:11 UTC
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7618 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
notepad-plus-plus notepad-plus-plus Affected: < 8.9.6.1
guessed Create a notification for this product.
Show details on NVD website
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