CVE-2026-124194: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on , the same day the CVE record was published.
VulnCheck KEV lists it since . It cites 3 public reports, the first from .
- How likely is exploitation in the next 30 days?
- 1.6%
EPSS score, percentile 76.4 of all scored records
- How severe?
- 6.5 Medium
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA (deadline ): Apply mitigations in accordance with vendor instructions … Full text
- Which versions are affected?
Affected
- 16.0.1
- from 16.0.1 to before 16.0.14334.21048
- from 16.0.0 to before 16.0.17932.21140
Source: CISA KEV 2026.11.10, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Microsoft Outlook Spoofing Vulnerability
Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
Required action, set by CISA
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 due date for this action: .
Linked from CISA's catalog entry
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-124194
- https://nvd.nist.gov/vuln/detail/CVE-2026-124194
This summary is based on the CVE record and CISA's catalog entry as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (3 products)
| Status | Versions |
|---|---|
| Affected | 16.0.1 |
| Status | Versions |
|---|---|
| Affected | from 16.0.1 to before 16.0.14334.21048 |
| Status | Versions |
|---|---|
| Affected | from 16.0.0 to before 16.0.17932.21140 |
Source: CVE List, as of . About the data.
Weakness
CWE-356
- CWE-356: Product UI does not Warn User of Unsafe Actions
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| Added to CISA KEV | |
| CVE record last updated | |
| CISA due date for the required action |
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