CVE-2026-47645

Name: CVE-2026-47645
Creator: NVD / NIST
Published: 2026-06-19T21:16:58.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.42%

Last modified Jun 26, 2026

CVE-2026-47645 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.42%

33.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Microsoft	365 Copilot	All versions

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47645Vendor Advisory

Timeline

Published: Jun 19, 2026
Last Modified: Jun 26, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-47645?

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

How severe is CVE-2026-47645?

CVE-2026-47645 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2026-47645?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-47645?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST