Description
Ai command injection in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.
Published: 2026-09-17
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure
Action: Patch
AI Analysis

Impact

The vulnerability arises from improper neutralization of special elements in user‑supplied commands, allowing command injection in the Microsoft Copilot service. This flaw enables an attacker to inject arbitrary commands that the Copilot backend executes, resulting in unintended disclosure of sensitive information or system state over the network. The weakness is a classic command injection defect classified as CWE‑77 and leads to loss of confidentiality for data processed by the affected service.

Affected Systems

All Microsoft Copilot deployments are affected until they apply the Microsoft patch. The CVE notes no specific version numbers, so every currently supported release should be considered at risk. Administrators should verify that their system is running a version that has received the patch and upgrade if necessary.

Risk and Exploitability

The CVSS score of 6.1 indicates moderate severity, while the EPSS score of less than 1 % shows a low probability of exploitation at the time of analysis. It is inferred from the description that the likely attack vector is remote, via a crafted command sent over the network to the Copilot backend. Because the vulnerability is not yet listed in CISA KEV, there is no evidence of active exploitation, but the combination of moderate severity, low exploitation likelihood, and remote applicability suggests a moderate risk that warrants timely mitigation to prevent data leakage.

Generated by OpenCVE AI on October 17, 2026 at 09:49 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the Microsoft‑provided update that patches the command injection flaw in Copilot.
  • Restrict Copilot API traffic to trusted, authenticated sources through network policies or firewall rules.
  • If custom scripts or integrations send user data to Copilot, enforce input validation or a command whitelist to reject special command characters.

Generated by OpenCVE AI on October 17, 2026 at 09:49 UTC.

Tracking

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Advisories

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History

Wed, 14 Oct 2026 23:15:00 +0000

Type Values Removed Values Added
Description Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to disclose information over a network. Ai command injection in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.

Fri, 25 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:copilot:-:*:*:*:*:*:*:*

Mon, 21 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 18 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 17 Sep 2026 23:15:00 +0000

Type Values Removed Values Added
Description Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.
Title Microsoft Copilot Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft copilot
Weaknesses CWE-77
CPEs cpe:2.3:a:microsoft:copilot:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft copilot
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C'}


Subscriptions

Microsoft Copilot
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-10-31T16:09:22.977Z

Reserved: 2026-06-17T17:37:17.983Z

Link: CVE-2026-55946

cve-icon Vulnrichment

Updated: 2026-09-18T14:30:26.268Z

cve-icon NVD

Status : Modified

Published: 2026-09-17T23:17:46.687

Modified: 2026-10-14T23:17:56.073

Link: CVE-2026-55946

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T10:00:08Z

Weaknesses
  • CWE-77

    Improper Neutralization of Special Elements used in a Command ('Command Injection')