Home/CVE/Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privilege
CVE

CVE-2026-33102

Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privilege

Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.

CRITICAL · CVSS 9.3 EPSS 0.00054
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
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Weakness Classification

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
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Affected Products & Versions

1
microsoft 365 copilotall versions
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Scoring & Timeline

9.3
CRITICAL · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD23 Apr 2026 · 10:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
msrcCVE-2026-33102Elevation of Privilege
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