CVE-2026-57233
Zip path-traversal in Notepad++ allows plugin DLL overwrite and remote code execution.
Is CVE-2026-57233 being exploited?
Not confirmed. CVE-2026-57233 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.54% probability of exploitation in the next 30 days.
How severe is CVE-2026-57233?
CVE-2026-57233 is rated High. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-57233?
Yes. A fix has been recorded for CVE-2026-57233. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-57233 affect?
CVE-2026-57233 affects Notepad++ < 8.9.7, Windows desktop systems running Notepad++, WinGup decompress function. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-57233?
Update Notepad++ to 8.9.7 or later; verify plugin directories and DLL integrity.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Path-traversal in WinGup unzip can overwrite plugin DLLs, enabling remote code execution when Notepad++ loads the plugin.
Immediate action required
- affected< 8.9.7
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.