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Microsoft fixes actively exploited Outlook zero-day vulnerability

By PulseAugur Editorial · [1 sources] ·

Microsoft has released a fix for a critical Outlook zero-day vulnerability, CVE-2026-124194, which was actively being exploited. The vulnerability allowed attackers to steal user NTLMv2 hashes by tricking users into opening specially crafted Office files. This could enable attackers to impersonate users. The fix is available for various Microsoft 365 and Office versions, and CISA has added it to its Known Exploited Vulnerabilities catalog. AI

IMPACT This vulnerability does not directly impact AI models or operations, but highlights general cybersecurity risks.

RANK_REASON Patch for a specific software vulnerability, not a new product release or major research.

Read on Mastodon — mastodon.social →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Microsoft fixes actively exploited Outlook zero-day vulnerability

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2 / 100
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Tool
Patch for a specific software vulnerability, not a new product release or major research.
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Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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product, safety
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Low
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Breaking (< 6h)
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Full methodology in our editorial standards.

COVERAGE [1]

  1. Mastodon — mastodon.social TIER_1 English(EN) · burso ·

    Microsoft's November Patch Tuesday fixes an Outlook zero-day, CVE-2026-124194, that is already exploited in the wild. Opening a crafted Office file can make Out

    Microsoft's November Patch Tuesday fixes an Outlook zero-day, CVE-2026-124194, that is already exploited in the wild. Opening a crafted Office file can make Outlook leak the user's NTLMv2 hash, which attackers can use to impersonate them. Affected: Microsoft 365 Apps for Enterpri…

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