Microsoft Office: security flaw used in attacks
OFFICIAL NAME: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability
DO THIS FIRSTFind out if you use it. If you do, apply the vendor's fix. Not sure if you use it? Send this page to your IT provider or security lead and ask.
TECHNICAL SUMMARY Microsoft Office Outlook contains a missing user interaction for potentially unsafe action vulnerability that allows an unauthorized attacker to perform spoofing over a network.
WHY THIS VERDICT Attacks are confirmed. The vulnerability is new today, so almost nothing is patched yet.
WHY IT RANKS HERE Exploitation is confirmed by an authoritative source. The confirmation is 1 day old. 7 products are affected.
- HIGHEST CONFIRMED RUNG
- EXPLOITED
- CISA KEV
- LISTED
- EXPLOIT CODE
- PROOF OF CONCEPT
How far has it climbed?
01 TALK
■ CONFIRMEDNEWEST EVIDENCE · 6 INDEPENDENT SOURCESCVE-2026-124194 discussed publicly (CIRCL sighting). CVE-2026-124194 discussed publicly (CIRCL sighting).
- SRC: CIRCL Vulnerability-Lookup sightings: CVE-2026-124194 discussed publicly (CIRCL sighting) · NOV 10
- SRC: The Register (security): November Patch Tuesday boasts over 1,000 bugs but only one zero-day so far · NOV 10
- SRC: Krebs on Security: Microsoft Fixes Nearly 1,100 Security Vulnerabilities · NOV 10
- SRC: CyberScoop: Microsoft fixes over 1,000 vulnerabilities in November Patch Tuesday · NOV 10
02 EXPOSED
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETWe have no source that counts exposed systems yet. Internet scan data needs a partnership we do not have. No evidence here does not mean nothing is exposed.
03 TRIED
■ CONFIRMEDNEWEST EVIDENCE · 4 INDEPENDENT SOURCESAttacks that worked are confirmed (step 4), so attempts count as confirmed too.
- SRC: CIRCL Vulnerability-Lookup sightings: Exploitation of CVE-2026-124194 reported (CIRCL sighting) · NOV 10
- SRC: CVE List V5 and CISA Vulnrichment: CISA Vulnrichment marks CVE-2026-124194 as actively exploited · NOV 10
- SRC: Microsoft Security Response Center: Microsoft confirms exploitation: Microsoft Outlook Spoofing Vulnerability · NOV 10
- SRC: CISA Known Exploited Vulnerabilities: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability · NOV 9
04 EXPLOITED
■ CONFIRMEDNEWEST EVIDENCE · 4 INDEPENDENT SOURCESExploitation of CVE-2026-124194 reported (CIRCL sighting). Exploitation of CVE-2026-124194 reported (CIRCL sighting).
- SRC: CIRCL Vulnerability-Lookup sightings: Exploitation of CVE-2026-124194 reported (CIRCL sighting) · NOV 10
- SRC: CVE List V5 and CISA Vulnrichment: CISA Vulnrichment marks CVE-2026-124194 as actively exploited · NOV 10
- SRC: Microsoft Security Response Center: Microsoft confirms exploitation: Microsoft Outlook Spoofing Vulnerability · NOV 10
- SRC: CISA Known Exploited Vulnerabilities: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability · NOV 9
05 DAMAGE
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETBreach notices and filings rarely name the flaw that was used, so we cannot link them to this event yet. No evidence here does not mean no harm.
When each thing happened
- DISCLOSED
- EXPLOIT CODE PUBLIC
- FIRST ATTACK REPORT
- CISA KEV LISTING
- US FEDERAL DEADLINE
THE FIX
CISA's instruction: apply the vendor's fix, or stop using the product if no fix exists. CISA set Nov 24, 2026 as the deadline for US federal agencies. It is a US government deadline; use it as a guide.
Questions to ask this week
- Do we run Microsoft Office? If yes, is it patched or cut off from the internet?
- Who owns fixing it, and by what date?
- Have we checked for signs of attack since the first report, not just since the patch?
How it unfolded
- Attack activity. NOV 9, 2026Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability
- Attack activity. NOV 10, 2026Microsoft confirms exploitation: Microsoft Outlook Spoofing Vulnerability
- NOV 10, 2026CVE-2026-124194 discussed publicly (CIRCL sighting) (37 reports)
- NOV 10, 2026Microsoft Patch Tuesday November 2027 , (Tue, Nov 10th)
- NOV 10, 2026Exploited Outlook Zero-Day Among 1,094 Flaws Patched by Microsoft
- Attack activity. NOV 10, 2026CISA Vulnrichment marks CVE-2026-124194 as actively exploited
- NOV 10, 2026Microsoft fixes over 1,000 vulnerabilities in November Patch Tuesday
- NOV 10, 2026Microsoft Fixes Nearly 1,100 Security Vulnerabilities
- NOV 10, 2026November Patch Tuesday boasts over 1,000 bugs but only one zero-day so far
- Attack activity. NOV 10, 2026Exploitation of CVE-2026-124194 reported (CIRCL sighting) (2 reports)
- NOV 10, 20261 public GitHub repository claims a proof of concept for CVE-2026-124194
- NOV 10, 2026Public proof of concept for CVE-2026-124194 (CIRCL sighting)
SOURCES
- [1] CIRCL Vulnerability-Lookup sightings: CVE-2026-124194 discussed publicly (CIRCL sighting), NOV 10
- [2] CIRCL Vulnerability-Lookup sightings: Exploitation of CVE-2026-124194 reported (CIRCL sighting), NOV 10
- [3] CIRCL Vulnerability-Lookup sightings: Public proof of concept for CVE-2026-124194 (CIRCL sighting), NOV 10
- [4] PoC-in-GitHub: 1 public GitHub repository claims a proof of concept for CVE-2026-124194, NOV 10
- [5] The Register (security): November Patch Tuesday boasts over 1,000 bugs but only one zero-day so far, NOV 10
- [6] Krebs on Security: Microsoft Fixes Nearly 1,100 Security Vulnerabilities, NOV 10
- [7] CyberScoop: Microsoft fixes over 1,000 vulnerabilities in November Patch Tuesday, NOV 10
- [8] CVE List V5 and CISA Vulnrichment: CISA Vulnrichment marks CVE-2026-124194 as actively exploited, NOV 10
- [9] SecurityWeek: Exploited Outlook Zero-Day Among 1,094 Flaws Patched by Microsoft, NOV 10
- [10] SANS Internet Storm Center: Microsoft Patch Tuesday November 2027 , (Tue, Nov 10th), NOV 10
- [11] Microsoft Security Response Center: Microsoft confirms exploitation: Microsoft Outlook Spoofing Vulnerability, NOV 10
- [12] CISA Known Exploited Vulnerabilities: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability, NOV 9
- [13] CIRCL Vulnerability-Lookup sightings: 37 more reports