Affects Microsoft Windows SMB Server — a ubiquitous OS network service; privileged SMB auth bypass can impact many enterprises and warrants broad attention.
CVE-2026-50360
Auth bug in Windows SMB Server allows authenticated attackers to elevate privileges remotely.
Is CVE-2026-50360 being exploited?
Not confirmed. CVE-2026-50360 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 0.78% probability of exploitation in the next 30 days.
How severe is CVE-2026-50360?
CVE-2026-50360 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-2026-50360?
Yes. A fix has been recorded for CVE-2026-50360. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-50360 affect?
CVE-2026-50360 affects Microsoft Windows SMB Server (SMB service), Windows Server (SMB-enabled hosts), Domain controllers running SMB. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-50360?
Apply vendor patch when released; restrict/block SMB access; enforce least privilege and network segmentation.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated network attacker can elevate privileges to SYSTEM on affected SMB servers, enabling remote code execution, lateral movement, or full host takeover.
Immediate action required
- 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>= 10.0.20348.0 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.