CVE-2026-48561

Microsoft Edge Copilot Remote Code Execution Vulnerability

At a glance

Severity: CRITICAL 9.6
EPSS: EPSS 0.86 % · percentile 58 (2026-10-27)
State: PUBLISHED
Published: 2026-07-14
Updated: 2026-10-08
Assigner: microsoft
NVD status: Modified

Description

Improper neutralization of special elements used in a command ('command injection') in Copilot Chat (Microsoft Edge) allows an unauthorized attacker to execute code over a network.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft
CVSS 3.1	CRITICAL 9.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)

Weaknesses (CWE)

CWE-77

European references

ENISA EUVD · EUVD-2026-43965
GCVE · GCVE-0-2026-48561

CERT-FR advisories

CERTFR-2026-AVI-0868 — Multiples vulnérabilités dans Microsoft Office · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:microsoft:365_copilot:-:*:*:*:*:android:*:*
cpe:2.3:a:microsoft:365_copilot:-:*:*:*:*:iphone_os:*:*

Affected products

Product	Versions
Microsoft · Microsoft Edge Copilot for Android	affected 1.0.0 < publication
Microsoft · Microsoft Edge Copilot for IOS	affected 1.0.0 < publication

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48561

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD