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High severity · published Jun 9, 2026
CVE-2026-42987
Windows Deployment Services (WDS) Remote Code Execution
8.1
CVSS
0.6%
EPSS
No
On KEV
Description
Use after free in Windows Deployment Services allows an unauthorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WS
Windows Server 2012 · Microsoft
6.2.9200.0 before 6.2.9200.26132 · source: vendor, NVD
WS
Windows Server 2012 (Server Core installation) · Microsoft
6.2.9200.0 before 6.2.9200.26132 · source: vendor
WS
Windows Server 2012 R2 · Microsoft
6.3.9600.0 before 6.3.9600.23228 · source: vendor
WS
Windows Server 2012 R2 (Server Core installation) · Microsoft
6.3.9600.0 before 6.3.9600.23228 · source: vendor
WS
Windows Server 2016 · Microsoft
10.0.14393.0 before 10.0.14393.9234 · source: vendor, NVD
WS
Windows Server 2016 (Server Core installation) · Microsoft
10.0.14393.0 before 10.0.14393.9234 · source: vendor
WS
Windows Server 2019 · Microsoft
10.0.17763.0 before 10.0.17763.8880 · source: vendor, NVD
WS
Windows Server 2019 (Server Core installation) · Microsoft
10.0.17763.0 before 10.0.17763.8880 · source: vendor
WS
Windows Server 2022 · Microsoft
10.0.20348.0 before 10.0.20348.5256 · source: vendor, NVD
WS
Windows Server 2025 · Microsoft
10.0.26100.0 before 10.0.26100.32995 · source: vendor, NVD
WS
Windows Server 2025 (Server Core installation) · Microsoft
10.0.26100.0 before 10.0.26100.32995 · source: vendor
Affected product
WS
Windows Server 2012
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42987
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42987
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42987
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