CVE-2026-47645

Published Jun 19, 2026

Last updated a month ago

CVSS high 8.8

Overview

Description
Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.
Source
secure@microsoft.com
NVD status
Analyzed
CNA Tags
exclusively-hosted-service
Products
365_copilot

Risk scores

CVSS 3.1

Type
Primary
Base score
8.8
Impact score
5.9
Exploitability score
2.8
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity
HIGH

Weaknesses

secure@microsoft.com
CWE-601

Social media

Hype score
Not currently trending

  1. 🐛 VULNERABILITIES CVE Notify: 🚨 [CVE-2026-47645](https://t.co/kH6UXYBCY6) Url redire... https://t.co/kH6UXYBCY6 #Vulnerability #CVE #ZeroDay

    @MalwareObserver

    26 Jun 2026

    30 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

Configurations

Related CVEs

  1. Improper access control in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a network.•CVE-2026-58617
  2. Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges locally.•CVE-2026-50387
  3. Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to execute code over a network.•CVE-2026-48561
  4. Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.•CVE-2026-41106
  5. Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.•CVE-2026-42895

References

Sources include official advisories and independent security research.