CVE-2026-124194
Microsoft Outlook Spoofing Vulnerability
Updated
- CVSS 3.1
- 6.5 MEDIUM
- EPSS
- 1.6% (76th pct)
- CISA KEV
- Exploited
- Published
- 2026-11-10
- Weakness
- CWE-356
Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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.
CISA notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-124194 ; https://nvd.nist.gov/vuln/detail/CVE-2026-124194
Description
Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.
Key Findings
as of 2026-11-12- CISA added CVE-2026-124194 to the KEV catalog on the day its CVE record was published. The median for entries added in 2026 so far is 12 days.
- It is one of 392 Microsoft entries in the CISA KEV catalog, and one of 41 added in 2026.
- Its current EPSS score (1.6%) is higher than that of 6% of CISA KEV entries.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:H/RL:O/RC:COpen in CVSS calculator Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Microsoft Microsoft 365 Apps for Enterprise | 16.0.1 to <https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Microsoft Office LTSC 2021 | 16.0.1 to <16.0.14334.21048 |
| Microsoft | Microsoft Microsoft Office LTSC 2024 | 16.0.0 to <16.0.17932.21140 |
References
1 linksVendor advisories
Record Details
- Published
- 2026-11-10
- Last updated
- 2026-11-11
- Assigner (CNA)
- microsoft
- Credited to
- -
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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). Alert titles and links from CISA cybersecurity alerts. This site is not affiliated with or endorsed by MITRE, NVD, CISA, or FIRST.