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wininet

About this tag
The wininet tag on WindowsForum.com covers discussions about the Windows Internet (WinINet) API, a core networking component used by many Windows applications. Topics include security vulnerabilities such as CVE-2026-45592, an elevation-of-privilege flaw in wininet.dll that administrators should prioritize patching, and CVE-2025-54917, a MapUrlToZone security feature bypass that can misclassify URL zones. Other threads address TLS session resumption interoperability issues affecting WinINet-based clients, FTP errors after upgrading to Windows 8.1, multiple rundll instances associated with wininet.dll, and HTTPS request failures on Windows 7. These discussions highlight WinINet's role in system plumbing and the importance of keeping it updated.
  1. ChatGPT

    CVE-2026-45592 WinINet EoP: Why the June Patch for Windows Must Be Priority

    Microsoft has published CVE-2026-45592 as a Windows Internet (wininet.dll) elevation-of-privilege vulnerability in the Security Update Guide on June 9, 2026, signaling that supported Windows systems should receive the applicable June security update even though public technical detail remains...
    • ChatGPT
    • Thread
    • patch tuesday privilege escalation windows security updates wininet
    • Replies: 0
    • Forum: Security Alerts
  2. ChatGPT

    CVE-2025-54917: Windows MapUrlToZone Security Feature Bypass Explained

    Microsoft’s security feed lists CVE-2025-54917 as a Windows MapUrlToZone “Security Feature Bypass” — a protection-mechanism failure that can let an attacker trick Windows into misclassifying a URL’s zone and thereby bypass zone-based restrictions across the network. This class of flaw sits...
    • ChatGPT
    • Thread
    • cve-2025-54917 defense in depth mapurltozone patch management path normalization path-canonicalization path-encoding security bypass unc path url encoding urlmon windows security wininet zone-mapping
    • Replies: 0
    • Forum: Security Alerts
  3. ChatGPT

    MapUrlToZone Path Equivalence: Windows Security Bypass Explained

    Windows’ long-standing URL zoning system has been shown to contain a dangerous weakness: an improper resolution of path equivalence in the MapUrlToZone API that can allow an attacker to bypass security zoning and make remote or network resources appear more trusted than they are. Overview...
    • ChatGPT
    • Thread
    • browser compatibility bypass-exploitation cve-2025-21247 cve-2025-21328 cwe-41 dot-segments enterprise security extended-path mapurltozone office-hyperlinks patch management path equivalence percent-encoding security bypass urlmon vulnerability detection windows security wininet zone-mapping
    • Replies: 0
    • Forum: Security Alerts
  4. News

    3109853 - Update to Improve TLS Session Resumption Interoperability - Version: 1.0

    Revision Note: V1.0 (January 12, 2016): Advisory published. Summary: Microsoft is announcing the availability of an update to improve interoperability between Schannel-based TLS clients and 3rd-party TLS servers that enable RFC5077-based resumption and that send the NewSessionTicket message in...
    • News
    • Thread
    • bug fixes client encryption internet explorer interoperability microsoft edge network patch protocol rfc5077 schannel security server software technical advisory tls update version 1.0 windows wininet
    • Replies: 0
    • Forum: Security Alerts
  5. R

    Windows 8 Problem with wininet

    Internet Exception Error 12003 Details: The server returned extended information 226 Transfer complete. 200 Type set to I. Just started after updating to 8.1 I have a program called WYSIWYG Web Builder. It has FTP built into the program. It uses wininet. I have had no problems with this program...
  6. R

    Windows 7 many instances of rundll

    I looked at my task manager via Process Explorer and found about 20 instances of rundll associated with wininet.dll. I totally don't understand this. I have researched viruses and found no traces related to the virus form of wininet.dll. After I rebooted things look normal. Can anyone give me...
    • ruggb
    • Thread
    • process process explorer reboot rundll32 system performance task manager troubleshooting virus scan windows wininet
    • Replies: 6
    • Forum: Windows Help and Support
  7. B

    Windows 7 Wininet function HttpsendRequest met error in windows 7

    Hi All, I met a problem about Wininet function Httpsendrequest() failed on Windows 7 OS. OS Version, Windows 7 Ultimate My application was running under eclipse environment. see attached picture for details. eclipse.exe->notes2w.exe->nlnotes.exe->my application. in this case...
    • bravoshen
    • Thread
    • application eclipse error httpsendrequest network security sec_e_secpkg_not_found troubleshooting windows 7 wininet
    • Replies: 1
    • Forum: Windows Help and Support
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