Windows kernel flaw enables local privilege escalation on a widely deployed OS; impact can disrupt enterprise systems and is high-profile.
CVE-2026-50670
Windows kernel out-of-bounds read allows local privilege escalation to SYSTEM.
Is CVE-2026-50670 being exploited?
Not confirmed. CVE-2026-50670 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 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2026-50670?
CVE-2026-50670 is rated High with a CVSS score of 8.8. 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-2026-50670?
Yes. A fix has been recorded for CVE-2026-50670. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-50670 affect?
CVE-2026-50670 affects Microsoft Windows (Kernel components). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-50670?
Apply vendor patch when released; restrict local admin, enable EDR, audit accounts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local authorized attacker can exploit an OOB read in the Windows kernel to escalate privileges to SYSTEM/kernel level.
Patch when possible
- affected>= 10.0.17763.0 and < 10.0.17763.9020
- affected>= 10.0.19044.0 and < 10.0.19044.7548
- affected>= 10.0.19045.0 and < 10.0.19045.7548
- affected>= 10.0.26100.0 and < 10.0.26100.8875
- affected>= 10.0.26200.0 and < 10.0.26200.8875
- affected>= 10.0.28000.0 and < 10.0.28000.2525
- affected>= 10.0.17763.0 and < 10.0.17763.9020
- affected>= 10.0.17763.0 and < 10.0.17763.9020
- affected>= 10.0.20348.0 and < 10.0.20348.5386
- affected>= 10.0.26100.0 and < 10.0.26100.33158
- affected>= 10.0.26100.0 and < 10.0.26100.33158
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.