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MS-Agent Vulnerability Let Attackers Hijack AI Agent to Gain Full System Control

A critical security vulnerability identified as CVE-2026-2256 has been discovered in the ModelScope MS-Agent Framework. This flaw allows attackers to potentially execute arbitrary commands, providing them with full control over the affected system.

EBy Eric WallaceMar 04, 20261 min read

A critical security vulnerability identified as CVE-2026-2256 has been discovered in the ModelScope MS-Agent Framework. This flaw allows attackers to potentially execute arbitrary commands, providing them with full control over the affected system.

The vulnerability arises from how MS-Agent processes external, untrusted input through its "Shell tool," which is designed to enable AI to run operating system commands. Researchers found that this tool does not properly sanitize input, allowing for command injection and remote code execution (RCE).

Metadata Details

CVE ID CVE-2026-2256

Software ModelScope MS-Agent Framework

Vulnerability Type Command Injection / Remote Code Execution (RCE)

A critical security vulnerability identified as CVE-2026-2256 has been discovered in the ModelScope MS-Agent Framework.
Eric Wallace · Thehackingpost

CVSS Score 9.8 (CVSS v3.1)

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector Remote

Impact Arbitrary command execution and potential full system compromise

Attackers can exploit this vulnerability using "prompt injection" by embedding malicious instructions within seemingly normal text. The framework attempts to block harmful commands with a filter called check_safe() , which uses a basic denylist of restricted terms. However, this defense can be bypassed with command obfuscation or alternative syntax.

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Exploiting CVE-2026-2256 allows an attacker to execute arbitrary operating system commands with the same privileges as the MS-Agent process. This could enable the attacker to:

Exfiltrate sensitive data accessible to the AI agent. Modify or delete critical system files. Install backdoors or establish persistence mechanisms. Move laterally across the network to compromise other enterprise assets.

As of the disclosure date, no security patch or official statement has been provided by the vendor. Organizations using MS-Agent are advised to implement the following measures until a fix is available:

Sandbox the Agent: Operate the MS-Agent framework in isolated environments to limit potential damage. Implement Least Privilege: Run the agent with the minimum necessary system permissions. Validate Ingested Content: Ensure all external content ingested by MS-Agent is verified and trusted. Strengthen Filtering Boundaries: Use strict allowlists to limit command execution to pre-approved actions.

Based on reporting by Cyber Security News.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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