Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
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.
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
Lifecycle Timeline
2DescriptionCVE.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
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. |
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-44091
GHSA-c62v-w9vq-37fj