CVE-2026-47644

highpriority · track · 40EPSS 0.007 · 54 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.73% (54th) EPSS

CVSS 7.5 · high

Is it mine?

7 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · msrc_csaf

EPSS · scored 2026-10-27

Improper neutralization of special elements in output used by a downstream component ('injection') in Copilot Chat (Microsoft Edge) allows an unauthorized attacker to disclose information over a network.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:Csecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nsecondary · secure@microsoft.com USexploitability 2.8 · impact 3.6

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Psecondary · CVSS-BT (t0sche)

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-74USCWE-74US

exploits (1)

Public proof-of-concept and weaponised exploit code.

songjianyang/CVE-2026-47644CVE-2026-47644 ($12,000): Edge Copilot Prompt Injection Leads to Cross-Tab Data Exfiltration - PoC & full writeupPoC · poc_in_github

affected products (7)

Products and version ranges known to be affected.

Microsoft 365 Copilot 365 Copilot's Business Chatall versionscert_bundDEcpe:/a:microsoft:365_copilot:-
Microsoft Azure HorizonDBall versionscert_bundDEcpe:/a:microsoft:azure:horizondb
Microsoft Edge Copilot Chatall versionscert_bundDEcpe:/a:microsoft:edge:copilot_chat
Microsoft Exchange Onlineall versionscert_bundDEcpe:/a:microsoft:exchange:online
Microsoft Copilot Chat (Microsoft Edge)all versionsenisa_euvdEU
Microsoft Copilot Chat (Microsoft Edge)all versionsfixedmsrc_csafUS
microsoft copilot chatall versionsnvdUScpe:2.3:a:microsoft:copilot_chat:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1792Microsoft Clouddienste: Mehrere Schwachstellen ermöglichen PrivilegieneskalationDeutsch2026-06-04csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Microsoft Clouddiensten wie Azure HorizonDB, Exchange Online, 365 Copilot und dem Copilot Chat in Edge ausnutzen, um seine Privilegien zu erweitern, um beliebigen Code auszuführen und um Informationen offenzulegen.
msrc_CVE-2026-47644Copilot Chat (Microsoft Edge) Information Disclosure Vulnerability2026-06-04csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund msrc_csaf nvd NVD CVE.org MITRE

published 2026-06-04modified 2026-07-23

references (3)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan