Exploited vulnerability · CISA KEV

Is CVE-2026-124194 exploited? Yes: in CISA KEV since 10 Nov 2026

Gociux · Microsoft Office · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-124194, Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 10 Nov 2026, the day it was published. It affects Microsoft Office. If you run it, CISA's required action is: 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.

What it is

Microsoft Office Outlook contains a missing user interaction for potentially unsafe action vulnerability that allows an unauthorized attacker to perform spoofing over a network.

What to do

1. Check whether you run it. Look for Office in your asset inventory, including appliances and cloud images. Stack check lists every exploited Microsoft CVE at once.
2. Apply the fix. 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.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 10 Nov 2026.
4. Get told next time. Email alerts when CISA adds a CVE for Microsoft.

Other exploited CVEs in Office

• CVE-2009-0238: Microsoft Office Remote Code Execution (14 Apr 2026)
• CVE-2026-21514: Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Vulnerability (10 Feb 2026)
• CVE-2026-21509: Microsoft Office Security Feature Bypass Vulnerability (26 Jan 2026)
• CVE-2009-0556: Microsoft Office PowerPoint Code Injection Vulnerability (7 Jan 2026)
• CVE-2007-0671: Microsoft Office Excel Remote Code Execution Vulnerability (12 Aug 2025)
• CVE-2023-23397: Microsoft Office Outlook Privilege Escalation Vulnerability (14 Mar 2023)

References

• msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-124194
• nvd.nist.gov/vuln/detail/CVE-2026-124194

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2026 · Microsoft scorecard · act-now radar.