Vulnerability in Microsoft 365 Apps
CVE-2026-124194
Product ui does not warn user of unsafe actions in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-124194 (vendor-advisory, patch, Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2026-124194?
- CVE-2026-124194 is a medium-severity vulnerability in Microsoft 365 Apps, classified under CWE-356. CVSS score: 6.5/10. Published 2026-11-10.
- How severe is CVE-2026-124194?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2026-124194 known to be exploited?
- Yes. CVE-2026-124194 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-11-10), indicating it is being actively exploited.