Is CVE-2026-48989 actively exploited?

No active exploitation of CVE-2026-48989 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-48989 be exploited remotely?

Yes. CVE-2026-48989 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-48989?

CVE-2026-48989 has a CVSS score of 8.9 (HIGH).

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HIGH

CVE-2026-48989

CWE-306Published: June 17, 2026· Updated: Jun 23, 2026

8.9

CVSS v3.1

Official Description

Windows-MCP is an open-source project that integrates AI agents with Windows. In versions prior to 0.7.5, certain HTTP modes exposed the MCP control plane without authentication while enabling wildcard CORS (allow_origins=*, allow_methods=*, allow_headers=*). Because the same server also exposed a PowerShell tool that executes caller-controlled commands as the Windows user running Windows-MCP, attackers could reach the control plane from arbitrary origins or non-browser clients and achieve arbitrary PowerShell execution. This issue was fixed in version 0.7.5.

NVD Source

Technical Analysis

CVE-2026-48989 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X