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Vulnerability record · CVE-2026-124194 · published 10 November 2026

CVE-2026-124194: Microsoft 365 apps vulnerability

Microsoft · 365 Apps

Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

6.5 CVSS 3.1 Medium CISA KEV since 10 Nov 2026 EPSS 1.6% · top 23.6% CWE-356 · CWE-356
6.5CVSS 3.1 base score
1.6%EPSS exploitation probability, 30 days
YesIn CISA KEV, federal fix due in 11 days
3Affected product versions listed by NVD
2References
11 Nov 2026Last modified by NVD

Description

Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

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

Exploitation in the wild

CISA added CVE-2026-124194 to the Known Exploited Vulnerabilities catalog on 10 November 2026 as "Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability". Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. Federal deadline 24 November 2026.

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124194 Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-124194 US Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-124194), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.