CVE-2026-47645

⚠️ high

Summary

Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.

CVSS Score

8.8

High

EPSS Score

0.4

Exploit Probability

Published Date

2026-06-19

First Seen: 2026-06-25

📊 Relative Risk Intelligence

This CVE is High Risk - more severe than 81.0% of all 340,405 vulnerabilities in our database.

#64,719

Top 25% most severe

Severity Percentile

🎯 CISA SSVC Assessment Updated: Jun 23, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Total

Complete system compromise possible

SSVC data provided by CISA

Last Modified 2026-06-26

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE IDs (Weakness Types)

CWE-601

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
microsoft	365_copilot	Affected	v-

🔗 References 1

https://msrc.microsoft.com/update-guide/vulnerabilit...

Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-50517	⛔ critical	9.9	1.3	Deserialization of untrusted data in M365 Copilot allows an authorized attacker to execute code over a network.	2026-07-24
CVE-2026-48561	⛔ critical	9.6	0.8	Improper neutralization of special elements used in a command ('command injection') in Copilot Chat (Microsoft Edge) all...	2026-07-14
CVE-2026-50387	⚠️ high	7.8	1.9	Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges locally.	2026-07-14
CVE-2026-58617	⚠️ high	8.1	0.7	Improper access control in Microsoft 365 Copilot for iOS allows an unauthorized attacker to elevate privileges over a ne...	2026-07-14
CVE-2026-41106	⛔ critical	9.3	0.5	Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privilege...	2026-07-02
CVE-2026-42895	🔶 medium	6.5	0.4	Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unaut...	2026-06-19

These CVEs affect the same products