CVE-2026-66050
LAN path traversal in NitroShare allows writing arbitrary files to host
Is CVE-2026-66050 being exploited?
Not confirmed. CVE-2026-66050 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 0.74% probability of exploitation in the next 30 days.
How severe is CVE-2026-66050?
CVE-2026-66050 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-2026-66050?
Not known from our data. No patch reference has been recorded for CVE-2026-66050, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-66050 affect?
CVE-2026-66050 affects NitroShare Desktop <= 0.3.4, Windows desktop, Linux desktop, macOS desktop. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-66050?
Update to a patched release when available; meanwhile disable LAN sharing and block NitroShare ports
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated LAN attacker can write arbitrary files (e.g., Windows Startup) enabling persistent code execution as the user.
Immediate action required
- affected<= 0.3.4
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.