Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. May 7, 2026 · NIST NVD

   Detected

   Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.

2. Jun 17, 2026 · NIST NVD

   Updated

   Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.

Affected

• cpe microsoft/365 copilot chatversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-26129

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-26129

  Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.

  nvd.nist.gov

References

• Vendor Advisory · msrc.microsoft.com