NITDA Warns Nigerians of Actively Exploited Microsoft Office Vulnerability

National Information Technology Development Agency (NITDA) has issued an urgent cybersecurity warning about a serious Microsoft Office vulnerability (CVE-2026-21509) that attackers are actively exploiting. This advisory, shared through Nigeria’s Computer Emergency Response Team (CERRT.NG), highlights the risks of this flaw and recommends immediate action to protect systems. Microsoft has released quick security updates to fix

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