Exploited in the Wild: Microsoft’s Windows LNK Flaw Finally Patched After Years of Attacks
In November 2025, Microsoft silently patched CVE-2025-9491, a Windows Shortcut (LNK) file vulnerability, after years of active exploitation dating back to 2017. This flaw allowed threat actors to leverage malicious LNK files for privilege escalation and potential remote code execution through user interface misinterpretation. Attackers routinely embedded harmful LNKs in phishing emails or compromised archives, enabling them to bypass security controls and gain unauthorized access to targeted Windows systems. The issue was resolved only after mounting pressure from researchers and documented abuse by multiple attacker groups. This incident is notable as it underscores persistent risks from longstanding Windows flaws exploited in the wild. The continued abuse of LNK vulnerabilities highlights the importance for organizations to prioritize patching and segment internal networks to limit the blast radius of privilege escalation attacks.
Kill Chain
