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ms15-121
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MS15-121 is a security bulletin published by Microsoft on November 10, 2015, addressing a spoofing vulnerability in the Secure Channel (Schannel) security package on Windows systems. The update, identified as KB3081320, resolves a flaw that could allow an attacker to perform a man-in-the-middle (MiTM) attack between a client and a legitimate server, potentially leading to spoofing. This update is rated Important and applies to supported versions of Microsoft Windows. Users are advised to apply the update to mitigate the risk of spoofing attacks targeting Schannel.
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MS15-121 - Important: Security Update for Schannel to Address Spoofing (3081320) - Version: 1.0
Severity Rating: Important Revision Note: V1.0 (November 10, 2015): Bulletin published. Summary: This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow spoofing if an attacker performs a man-in-the-middle (MiTM) attack between a client and a legitimate...- News
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- attack bulletin client cybersecurity important microsoft mitm ms15-121 november 2015 patch revision schannel security server spoofing update vulnerability windows
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- Forum: Security Alerts
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MS15-121: Security update for Schannel to address spoofing: November 10, 2015
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- 2015 microsoft ms15-121 november patch schannel security spoofing support update
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- Forum: Knowledge Base (KB)