cve-2025-21418

About this tag
CVE-2025-21418 is a critical zero-day vulnerability in the Windows Ancillary Function Driver for WinSock, identified as a heap-based buffer overflow (CWE-122). This flaw allows local attackers to escalate privileges to SYSTEM level, posing significant risks to enterprise networks. Discussions on WindowsForum.com cover technical details, exploitation risks, and urgent patching guidance for system administrators. The vulnerability was addressed in Microsoft's February 2025 Patch Tuesday updates, alongside other critical fixes for Windows Server components like Storage, LDAP, NTLM, and Hyper-V. Administrators are advised to apply patches immediately to mitigate active exploitation threats.

  1. WinSock AFD Race Condition: What Sysadmins Must Do Now (CVE-2025-53134)

    Title: What sysadmins need to know about the WinSock AFD race-condition EoP entry you sent (CVE-2025-53134) — situation, risk, and what to do now Executive summary You sent the MSRC URL for CVE-2025-53134 (Windows Ancillary Function Driver for WinSock — race condition / improper synchronization...
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    • afd.sys cisa cve-2025-21418 cve-2025-32709 cve-2025-49661 cve-2025-53134 edr incident response kernel vulnerability local eop microsoft patch msrc nvd patch privilege escalation race condition siem threat detection windows security winsock
    • Replies: 0
    • Forum: Security Alerts

  2. Critical Windows Server Vulnerabilities: February Patch Update Insights

    In this month’s patch update round-up, cybersecurity experts are ringing alarm bells for CISOs and Windows administrators alike. The spotlight falls on two actively exploited Windows Server vulnerabilities—one in the Windows Storage component and a more critical weakness in the Windows Ancillary...
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    • cve-2025-21391 cve-2025-21418 cybersecurity hyper-v ldap network security ntlm patch vulnerability windows server
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    • Forum: Windows News

  3. February Patch Tuesday: Critical Security Updates You Need to Know

    February Patch Tuesday: Critical Security Updates You Need to Know Introduction Every month, Microsoft releases a set of security updates—known as Patch Tuesday—that address vulnerabilities across its software products. February 2025's Patch Tuesday is particularly critical, as it includes fixes...
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    • cve-2025-21418 patch remote code execution windows security zero-day vulnerabilities
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    • Forum: Windows News

  4. Critical Zero-Day Vulnerability CVE-2025-21418: Windows Driver Flaw Exposed

    A new wave of cybersecurity concern is making headlines as a critical zero-day vulnerability in a Windows driver has been uncovered. With the potential to allow attackers to remotely escalate privileges and gain SYSTEM-level access, this flaw is making even the most cautious Windows users take...
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    • buffer overflow cve-2025-21418 cybersecurity extended security updates windows 10 windows 11 zero-day vulnerabilities
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    • Forum: Windows News

  5. Urgent Windows Server Patch: Address Critical Vulnerabilities Now

    Windows administrators and security professionals, take note—this Patch Tuesday, two actively exploited vulnerabilities in Windows Server are demanding your immediate action. In a recent advisory, experts highlighted significant security flaws that, if left unpatched, could cast a long shadow...
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    • cve-2025-21391 cve-2025-21418 it management patch security vulnerability windows server
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  6. CVE-2025-21418: Critical WinSock Driver Vulnerability Explained

    A fresh entry in the Microsoft Security Response Center (MSRC) update guide reveals CVE-2025-21418—a vulnerability affecting the Windows Ancillary Function Driver for WinSock. This particular flaw could potentially be exploited to elevate user privileges, posing significant concerns for both...
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    • cve-2025-21418 patch management privilege escalation windows security winsock
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    • Forum: Security Alerts