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Windows Server 2025 CVE-2026-49169

| EUVDEUVD-2026-43981 HIGH
Use After Free (CWE-416)
2026-07-14 microsoft GHSA-3f5f-3xp4-rx44
8.8
CVSS 3.1 · NVD
Temporal: 7.0
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Severity by source

Vendor (microsoft) PRIMARY
HIGH
qualitative
NVD
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CIRCL (temporal)
7.0 HIGH
cvss
vuln.today AI
8.0 HIGH

Network-reachable DNS service but requires elevated DNS privileges (PR:H) and winning a use-after-free race (AC:H); scope change and full C/I/A impact reflect code execution in a system service.

3.1 AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Updated
Jul 16, 2026 - 16:28 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Jul 16, 2026 - 16:22 vuln.today
cvss_changed
CVSS changed
Jul 16, 2026 - 16:22 NVD
8.0 (HIGH) 8.8 (HIGH)
Analysis Generated
Jul 14, 2026 - 17:41 vuln.today
CVE Published
Jul 14, 2026 - 17:04 nvd
HIGH 8.0

DescriptionNVD

Use after free in DNS Server allows an authorized attacker to execute code over a network.

AnalysisAI

Remote code execution in the Microsoft Windows Server 2025 DNS Server role allows an authenticated network attacker to run arbitrary code by triggering a use-after-free memory-corruption condition (CWE-416). Both the full and Server Core installations of build 10.0.26100 prior to 10.0.26100.33158 are affected, with total impact to confidentiality, integrity and availability. There is no public exploit identified at time of analysis, and CISA SSVC currently rates exploitation as 'none'; EPSS is modest at 0.50% (39th percentile).

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CVE-2026-49169 vulnerability details – vuln.today

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