What’s Vulnerable › Vulnerabilities

CVE-2026-55946: Microsoft Copilot Information Disclosure Vulnerability

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-31
• Weakness: CWE-77

Description

Ai command injection in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.

Affected products

• Microsoft Copilot: all versions
• Microsoft Copilot: all versions

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55946

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