CVE-2026-42824
M365 Copilot Information Disclosure Vulnerability
Description
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.
INFO
Published Date :
June 4, 2026, 11:17 p.m.
Last Modified :
June 8, 2026, 1:52 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-42824
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | f38d906d-7342-40ea-92c1-6c4a2c6478c8 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Public PoC/Exploit Available at Github
CVE-2026-42824 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42824.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42824 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42824 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42824
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
灵砚 Oraink 公开科技互联网日报/周报归档，汇聚公众号、推特、博客、Newsletter 等优质创作者与一线团队文章。
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42824 vulnerability anywhere in the article.
-
The Cyber Express
The Cyber Express Weekly Roundup: Cybersecurity Weekly Round on Emerging Threats, Data Breaches, and Global Policy Shifts
This week’s weekly roundup of cybersecurity developments highlights an expanding intersection of cyber risk, regulatory action, and enterprise vulnerability. Across healthcare, technology platforms, g ... Read more
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The Cyber Express
Critical SearchLeak Flaw in Microsoft 365 Copilot Exposed Sensitive Enterprise Data
A newly disclosed SearchLeak vulnerability in Microsoft 365 Copilot Enterprise exposed a critical pathway for attackers to steal sensitive organizational data through a specially crafted URL. The flaw ... Read more
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The Hacker News
One-Click Microsoft 365 Copilot Flaw Could Have Let Attackers Steal Emails, Files, and MFA Codes
A single click on a trusted Microsoft link could have let an attacker pull emails, calendar details, and indexed files out of Microsoft 365 Copilot Enterprise Search. Researchers at Varonis Threat Lab ... Read more
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security.nl
Microsoft 365 Copilot-lek maakte via één click diefstal e-mails mogelijk
Een kritieke kwetsbaarheid in Microsoft 365 Copilot maakte het mogelijk om door middel van één click van een slachtoffer e-mails en bestanden uit zijn mailbox, SharePoint en OneDrive te stelen en toeg ... Read more
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CrowdStrike.com
June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-Days
Microsoft has addressed 206 vulnerabilities in its June 2026 security update release. This month's patches include fixes for three publicly disclosed zero-day vulnerabilities and 37 Critical vulnerabi ... Read more
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TheCyberThrone
Microsoft Patch Tuesday — June 2026
Microsoft’s June 2026 Patch Tuesday is the largest release since the Patch Tuesday program began, surpassing the previous record of 167 CVEs set in October 2025. This month’s release addresses 206 vul ... Read more
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Zero Day Initiative
The June 2026 Security Update Review
CVE Title Severity CVSS Public Exploited XI Type CVE-2026-41091 Microsoft Defender Elevation of Privilege Vulnerability Important 7.8 Yes Yes 0 EoP CVE-2026-49160 HTTP.sys Denial of Service Vulnerabil ... Read more
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security.nl
Kritieke lekken in Exchange Online en Copilot maakten datadiefstal mogelijk
Microsoft heeft kritieke kwetsbaarheden in Exchange Online en Copilot gepatcht die het stelen van data mogelijk maakten. Ook is een M365 Copilot-lek verholpen dat tot remote code execution (RCE) kon l ... Read more
The following table lists the changes that have been made to the
CVE-2026-42824 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:microsoft:copilot:-:*:*:*:*:*:*:* Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42824 Types: Vendor Advisory -
New CVE Received by [email protected]
Jun. 04, 2026
Action Type Old Value New Value Added Tag exclusively-hosted-service Added Description Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Added CWE CWE-77 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42824