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Windows Server 2016 CVE-2025-49657

| EUVDEUVD-2025-20648 HIGH
Heap-based Buffer Overflow (CWE-122)
2025-07-08 secure@microsoft.com
Microsoft Heap Overflow Buffer Overflow Windows Server 2016 Windows Server 2008 Windows Server 2022 23h2 Windows Server 2025 Windows Server 2022 Windows Server 2012 Windows Server 2019 Windows
8.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

6
Analysis Updated
Apr 16, 2026 - 06:32 EUVD-patch-fix
executive_summary
Re-analysis Queued
Apr 16, 2026 - 05:29 backfill_euvd_patch
patch_released
Patch available
Apr 16, 2026 - 05:29 EUVD
10.0.25398.1732,6.0.6003.23418,6.3.9600.22676
EUVD ID Assigned
Mar 16, 2026 - 04:21 euvd
EUVD-2025-20648
Analysis Generated
Mar 16, 2026 - 04:21 vuln.today
CVE Published
Jul 08, 2025 - 17:15 nvd
HIGH 8.8

DescriptionCVE.org

Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.

Analysis

Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.

Technical ContextAI

A buffer overflow occurs when data written to a buffer exceeds its allocated size, potentially overwriting adjacent memory and corrupting program state. This vulnerability is classified as Heap-based Buffer Overflow (CWE-122).

RemediationAI

Use memory-safe languages or bounds-checked functions. Enable ASLR, DEP/NX, and stack canaries. Apply vendor patches promptly.

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Same weakness CWE-122 – Heap-based Buffer Overflow

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CVE-2025-49657 vulnerability details – vuln.today
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