CVE-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.

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CVSS v3.1

7.5 HIGH

EPSS

1.14%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

ScopeUNCHANGED

ConfidentialityHIGH

IntegrityNONE

AvailabilityNONE

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

Connections

2 relationships

CWE-138

source

Timeline

disclosure → media coverage

May 7, 2026

Disclosure — published as a CVE record. · last revised by NVD Jun 1, 2026