Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
🛡️
Not in CISA KEV
HIGH severity

CVE-2026-50444 — Windows 10 1607

HIGH

CVE-2026-50444 is a high-severity (CVSS 8.8) Missing Authentication vulnerability in microsoft windows 10 1607. A fix is available — see the affected versions and patch details below.

Missing authentication for critical function in Windows Server Update Service allows an authorized attacker to elevate privileges over a network.

Published
Updated
Affected
7 products
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-50444.

EPSS Exploitation Probability

via FIRST.org ↗
0.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs55th percentile — riskier than 55% of all scored CVEsHighest risk
0.28%0.61%0.94%1.28%0.8%0.8%0.8%Sep 26Oct 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2026-50444 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

Missing authentication for critical function in Windows Server Update Service allows an authorized attacker to elevate privileges over a network.

Affected Products

7 products · 10 configurations
OS
windows 10 1607microsoft
< 10.0.14393.9339
range
OS
windows 10 1809microsoft
< 10.0.17763.9020
range
OS
windows server 2012microsoft
1 version
r2
OS
windows server 2016microsoft
< 10.0.14393.9339
range
OS
windows server 2019microsoft
< 10.0.17763.9020
range
OS
windows server 2022microsoft
< 10.0.20348.5386
range

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every microsoft windows 10 1607 deployment and check each version against the affected-products list above.

  2. Fix

    Apply the microsoft windows 10 1607 security patch or hotfix for CVE-2026-50444 on the affected version, following the vendor advisory for your exact build.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

Missing authentication for critical function in Windows Server Update Service allows an authorized attacker to elevate privileges over a network.
O3 Security · Runtime Protection

Is CVE-2026-50444 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

Protect my workloads How runtime protection works
CVE-2026-50444: Windows 10 1607 (High 8.8)