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

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Aug 24, 2026 · Catalog

   Detected

   This vulnerability allows remote attackers to disclose NTLM responses on affected installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 3.3. The following CVEs are assigned: CVE-2026-50508.

Sources

• CVE.orgVulnerability recordCVE-2026-50508

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-50508

  30-day exploitation probability 0.9%

  first.org
• Zero Day InitiativeCoordinated disclosureZDI-26-605

  This vulnerability allows remote attackers to disclose NTLM responses on affected installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 3.3. The following CVEs are assigned: CVE-2026-50508.

  zerodayinitiative.com