M365 Copilot
CVE-2025-32711 — M365 Copilot Information Disclosure Vulnerability
Executive Summary
Ai command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Overview
7.5
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
Low
AVAILABILITY
None
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 8.1
EPSS Score
0.07961
probability of exploitation in the next 30 days
0.94228 percentile - updated 2026-08-14
View on FIRST.org
Exploits & PoC
4 public PoCsUnverified third-party code
Public proof-of-concept repositories aggregated from PoC-in-GitHub. They are not reviewed and may be incomplete, non-functional, or malicious — inspect the code before running anything.
| Repository | Stars | Published | Description |
|---|---|---|---|
| vikasudasi/exfil-scan | 6 | 2026-07-25 | Scan LLM outputs and AI-generated content for data exfiltration signals (EchoLeak, CVE-2025-32711) before they reach users or downstream systems |
| daryllundy/cve-2025-32711 | 3 | 2025-06-27 | Proof-of-concept and analysis for CVE-2025-32711 |
| TreRB/markdown-exfil-tester | 0 | 2026-04-20 | Black-box test whether an LLM chatbot is vulnerable to markdown/HTML exfil (CVE-2025-32711 class). Spins up a sink, sends payloads, renders in headless Chromium, correlates via network. |
| Danielossai12/aisecplus-week01-danielossai | 0 | 2026-06-13 | AISec Plus Week 1 threat write-up — EchoLeak (CVE-2025-32711), zero-click indirect prompt injection in Microsoft 365 Copilot. |
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
Aim Labs (Part of Aim Security)
Estevam Arantes
References
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