High severity · published Jul 8, 2025
CVE-2025-49729
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network
8.8
CVSS
0.7%
EPSS
No
On KEV
Description
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WS
Windows Server 2008 · Microsoft
r2 · source: NVD
WS
Windows Server 2012 · Microsoft
r2 · source: NVD
WS
Windows Server 2016 · Microsoft
before 10.0.14393.8246 · source: NVD
WS
Windows Server 2019 · Microsoft
before 10.0.17763.7558 · source: NVD
WS
Windows Server 2022 · Microsoft
before 10.0.20348.3932 · source: NVD
WS
Windows Server 2022 23h2 · Microsoft
before 10.0.25398.1732 · source: NVD
WS
Windows Server 2025 · Microsoft
before 10.0.26100.4652 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-49729
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-49729
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49729
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