[-] Microsoft ".library-ms" File / NTLM Information Disclosure Spoofing (Resurrected 2025) / CVE-2025-24054 [+] John Page (aka hyp3rlinx) [+] x.com/hyp3rlinx [+] ISR: ApparitionSec Back in 2018, I reported a ".library-ms" File NTLM information disclosure vulnerability to MSRC and was told "it was not severe enough", that being said I post it anyways. Seven years passed, until other researchers re-reported it. Subsequently this security flaw was finally deemed important by Microsoft and it received CVE-2025-24054, for which I was finally retroactively credited as the original reporter. Circa 2025 updated: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24054 [References] https://web.archive.org/web/20190106181024/https://hyp3rlinx.altervista.org/advisories/MICROSOFT-WINDOWS-.LIBRARY-MS-FILETYPE-INFORMATION-DISCLOSURE.txt https://packetstorm.news/files/id/148556/ https://cxsecurity.com/issue/WLB-2018070160 [Network Access] Remote [Original Disclosure Timeline] Vendor Notification: Jun 29, 2018 MSRC Response: Jul 12, 2018 "risk is not severe enough to justify immediate servicing." July 14, 2018 : Public Disclosure [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. All content copyright (c). hyp3rlinx