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Severity by source

Vendor (microsoft) PRIMARY
6.1 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
CIRCL (temporal)
5.3 MEDIUM
cvss
vuln.today AI
6.1 MEDIUM

Local access with low-privilege account required per description; DNS tampering yields high integrity impact with no confidentiality exposure and minimal availability disruption; system scope unchanged.

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

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

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

Lifecycle Timeline

2
Analysis Generated
Jul 14, 2026 - 22:05 vuln.today
CVE Published
Jul 14, 2026 - 17:07 nvd
MEDIUM 6.1

DescriptionCVE.org

Improper access control in Microsoft Windows DNS allows an authorized attacker to perform tampering locally.

AnalysisAI

Local tampering in Windows DNS via improper access control (CWE-284) allows a low-privilege authenticated local user to manipulate DNS configuration or records across a broad range of Windows 10, Windows 11, and Windows Server releases. The CVSS vector (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L) confirms exploitation requires only a valid local account with no elevated privileges, yielding high integrity impact with minimal availability disruption and no direct confidentiality exposure. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privilege local or domain account
Delivery
Establish local or RDP session on target system
Exploit
Invoke Windows DNS component via improper access control
Execution
Tamper with DNS records or local resolver configuration
Persist
Redirect authentication-dependent hostname resolution to attacker-controlled endpoint
Impact
Harvest credentials or intercept sessions from redirected users

Vulnerability AssessmentAI

Exploitation Exploitation requires an authenticated local session on the affected Windows system with at minimum a standard low-privilege user or domain account, confirmed by CVSS PR:L and AV:L. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 6.1 (Medium) reflects a local attack vector (AV:L), low attack complexity (AC:L), and low privilege requirement (PR:L), meaning exploitation is straightforward for anyone holding a valid local or domain account but is strictly confined to the local system (S:U). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker holding a low-privilege domain account - obtained through phishing, credential stuffing, or lateral movement - establishes an RDP or interactive session on a shared Windows Server or multi-user workstation. The attacker invokes the improperly access-controlled DNS component to modify local DNS cache entries or resolver configuration, redirecting resolution of internal hostnames such as authentication servers or internal web portals to an attacker-controlled IP. …
Remediation Apply the vendor-released security update per the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50495. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-44091 vulnerability details – vuln.today

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