Windows Server Update Service (WSUS) Elevation of Privilege Vulnerability (Microsoft Windows 10 Version 1607)

CVE-2026-50444

HIGH 8.8

At a glance

Source: NVD
EPSS: EPSS 0.78 % · percentile 56 (2026-10-31)
State: PUBLISHED
Published: 2026-07-14 17:07 UTC
Updated: 2026-11-01 17:35 UTC
Assigner: microsoft
NVD status: Analyzed

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Description

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

Weaknesses (CWE)

CWE-306 — Missing Authentication for Critical Functionality

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50444

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft
CVSS 3.1	HIGH 8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)

European references

ENISA EUVD · EUVD-2026-44074
GCVE · GCVE-0-2026-50444

CERT-FR advisories

CERTFR-2026-AVI-0869 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:* < 10.0.14393.9339
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:* < 10.0.14393.9339
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* < 10.0.17763.9020
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* < 10.0.17763.9020
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* < 10.0.14393.9339
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* < 10.0.17763.9020
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* < 10.0.20348.5386
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:* < 10.0.26100.33158

Affected products

Product	Versions
Microsoft · Windows 10 Version 1607	affected 10.0.14393.0 < 10.0.14393.9339
Microsoft · Windows 10 Version 1809	affected 10.0.17763.0 < 10.0.17763.9020
Microsoft · Windows Server 2012	affected 6.2.9200.0 < 6.2.9200.26226
Microsoft · Windows Server 2012 (Server Core installation)	affected 6.2.9200.0 < 6.2.9200.26226
Microsoft · Windows Server 2012 R2	affected 6.3.9600.0 < 6.3.9600.23291
Microsoft · Windows Server 2012 R2 (Server Core installation)	affected 6.3.9600.0 < 6.3.9600.23291
Microsoft · Windows Server 2016	affected 10.0.14393.0 < 10.0.14393.9339
Microsoft · Windows Server 2016 (Server Core installation)	affected 10.0.14393.0 < 10.0.14393.9339
Microsoft · Windows Server 2019	affected 10.0.17763.0 < 10.0.17763.9020
Microsoft · Windows Server 2019 (Server Core installation)	affected 10.0.17763.0 < 10.0.17763.9020
Microsoft · Windows Server 2022	affected 10.0.20348.0 < 10.0.20348.5386
Microsoft · Windows Server 2025	affected 10.0.26100.0 < 10.0.26100.33158
Microsoft · Windows Server 2025 (Server Core installation)	affected 10.0.26100.0 < 10.0.26100.33158

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD