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ZDI-26-605: Microsoft Windows Localized Filenames Improper Input Validation NTLM Response Information Disclosure Vulnerability

ZDI advisory ZDI-26-605 details an improper input validation flaw (CVE-2026-50508, CVSS 3.3) in Microsoft Windows localized filenames that leaks NTLM responses.

The Zero Day Initiative released advisory ZDI-26-605 describing improper input validation in Microsoft Windows handling of localized filenames. Remote attackers can disclose NTLM authentication responses if the target opens a malicious file or visits a crafted page. ZDI rated the issue CVSS 3.3 and assigned CVE-2026-50508. Leaked NTLM responses could enable offline credential cracking.

ZDI Published AdvisoriesAug 24, 05:00 UTC · 24d agoAdvisory CVE-2026-505081

Accenture supports Exxaro to digitally transform its business and unlock new revenue streams

Help Net SecuritySep 17, 00:00 UTC · Sep 17, 2019Advisory

Microsoft Releases Emergency Patch to Fix RDS Snafu

Microsoft's out-of-band KB5129195 fixes September Patch Tuesday regressions breaking RDS connections, Hyper-V shared folders, and USB audio.

Microsoft released cumulative out-of-band update KB5129195 on September 14, 2026, fixing RDS instability causing failing RDP connections, sign-in issues, and hanging servers. The patch also resolves Hyper-V Plan9 shared-folder failures affecting WSL and Claude Cowork, plus USB Audio Class 1.0 device failures. This is Microsoft's sixth emergency patch after a September Patch Tuesday that fixed a record 974 CVEs.

Infosecurity MagazineSep 15, 08:40 UTC · 2d agoAdvisory 3 sources

Microsoft confirms KB5002914 Excel update breaks copy and paste

Microsoft confirms KB5002914 Office security update silently breaks copy-paste, autofill, and formula dragging in Excel 2016 through 2024.

Microsoft confirmed the September 2026 KB5002914 security update breaks copy-and-paste, autofill, and formula dragging in Excel 2024, 2021, 2019, and 2016. Failures occur silently with no beep or error message, leaving the destination unmodified. Uninstalling KB5002914 via OfficeC2RClient or Oarpmany restores functionality while Microsoft investigates.

BleepingComputerupdated Sep 15, 09:25 UTC · 1d agofirst Sep 15, 08:40 UTC · 2d agoAdvisory 3 sources2

CISA releases free tool for detecting malicious activity in Microsoft cloud environments

Help Net SecurityMar 24, 00:00 UTC · Mar 24, 2023Advisory