Login Request a demo
Critical severity · published Jul 14, 2026
CVE-2026-49181
Windows DHCP Client Elevation of Privilege Vulnerability
9.8
CVSS
1.2%
EPSS
No
On KEV
Description
Integer underflow (wrap or wraparound) in Windows DHCP Client allows an unauthorized attacker to elevate privileges over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 67% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
W1
Windows 10 Version 1607 · Microsoft
10.0.14393.0 before 10.0.14393.9339 · source: vendor
W1
Windows 10 Version 1809 · Microsoft
10.0.17763.0 before 10.0.17763.9020 · source: vendor
WS
Windows Server 2012 · Microsoft
6.2.9200.0 before 6.2.9200.26226 · source: vendor, NVD
WS
Windows Server 2012 (Server Core installation) · Microsoft
6.2.9200.0 before 6.2.9200.26226 · source: vendor
WS
Windows Server 2012 R2 · Microsoft
6.3.9600.0 before 6.3.9600.23291 · source: vendor
WS
Windows Server 2012 R2 (Server Core installation) · Microsoft
6.3.9600.0 before 6.3.9600.23291 · source: vendor
WS
Windows Server 2016 · Microsoft
10.0.14393.0 before 10.0.14393.9339 · source: vendor, NVD
WS
Windows Server 2016 (Server Core installation) · Microsoft
10.0.14393.0 before 10.0.14393.9339 · source: vendor
WS
Windows Server 2019 · Microsoft
10.0.17763.0 before 10.0.17763.9020 · source: vendor, NVD
WS
Windows Server 2019 (Server Core installation) · Microsoft
10.0.17763.0 before 10.0.17763.9020 · source: vendor
WS
Windows Server 2022 · Microsoft
10.0.20348.0 before 10.0.20348.5386 · source: vendor, NVD
WS
Windows Server 2025 · Microsoft
10.0.26100.0 before 10.0.26100.33158 · source: vendor, NVD
Affected product
W1
Windows 10 Version 1607
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49181
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49181
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49181
More from Windows 10 Version 1607
9.8
CVE-2026-33824
Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability
8.8
CVE-2026-96951
Windows Shell Security Feature Bypass Vulnerability
8.8
CVE-2026-21510
Windows Shell Security Feature Bypass Vulnerability
8.8
CVE-2026-21513
MSHTML Framework Security Feature Bypass Vulnerability
8.8
CVE-2025-33073
Windows SMB Client Elevation of Privilege Vulnerability