Security Digest · Vulnerability record
CVE-2025-32711: M365 Copilot Information Disclosure Vulnerability
Ai command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
CVSS 9.3 Critical EPSS 8.0% · p95 Most can relax
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 8.0%, percentile 95: FIRST’s model estimates a 8.0% chance of exploitation activity in the next 30 days, higher than 95% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Most can relax. EchoLeak: Zero-Click Data Leak in Microsoft 365 Copilot — Nothing to patch: Microsoft fixed it in its cloud service before disclosure and saw no exploitation, but it is the reference case for why AI assistants that read untrusted content need guardrails.
What it is
Ai command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Weakness type: CWE-74.
Product: Microsoft Microsoft 365 Copilot · Assigned by: microsoft · Published: 2025-06-11
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Microsoft | Microsoft 365 Copilot | - |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoft | 3.1 | 9.3 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 8.03% probability of exploitation activity in the next 30 days; percentile 95.
Timeline
- — CVE record published by microsoft
- — erroneo.us brief: EchoLeak: Zero-Click Data Leak in Microsoft 365 Copilot
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- M365 Copilot Information Disclosure Vulnerability msrc.microsoft.com
Vulnerability records
- CVE.org record CVE-2025-32711 cve.org
- NVD entry CVE-2025-32711 nvd.nist.gov
Other references from the CVE record and advisory
- aim.security aim.security