Intel

CVE-2026-41106

365_copilot: URL Redirection to Untrusted Site ('Open Redirect') (CVE-2026-41106)

criticalEPSS 0.7%

Description

Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.

Source: BSI WID PortalBSI CSAFcvelistv5NVD (NIST)Microsoft Security Update Guide

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

microsoft365_copilot

Metrics

XIEM Effective CVSS
9.3
Source: nvd-v3
EPSS percentile
52.4 %
High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
—
Show all metrics
Severity
critical
Priority score
89.73
Exploit maturity
no public PoC known
CVSS v3
9.3
EPSS score
0.7 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-07-02 22:18 UTC
CWE
CWE-601

Weakness classes (CWE)

  • CWE-601Base

    URL Redirection to Untrusted Site ('Open Redirect')

    The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Modified2026-07-07 05:16 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-41106","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI… → {"id":"CVE-2026-41106","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  2. CVE Modified2026-07-06 13:16 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-41106","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  3. New CVE Received2026-07-02 23:16 UTC· secure@microsoft.com
    • Affected: Microsoft 365 Copilot
    • Tag: exclusively-hosted-service
    • Description: Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.
    • CVSS V3.1: AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Linked advisories