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Unpatched Windows search URI handler vulnerability exposes NTLMv2 hashes

Evidence first: scan the strongest sources, then decide whether to go deeper.

Published 2026-06-03 10:18 UTCUpdated 2026-06-03 22:23 UTC
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cvevulnerabilitywindowssecurity
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Evidence trail (top sources)
top sources (2 domains)domains are deduped. counts indicate coverage, not truth.
2 top sources shown
limited source diversity in top sources
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Overview

A recently identified security flaw in the Windows search URI handler has been disclosed by cybersecurity researchers. This vulnerability enables attackers to steal NTLMv2 hashes, which are used for user authentication. The issue bears resemblance to the earlier CVE-2026-33829 vulnerability that impacted the Windows Snipping Tool's ms-screensketch URI handler and was patched. The new flaw remains unpatched, raising concerns about potential exploitation and the need for prompt mitigation measures.

Entities
Microsoft
Score total
0.99
Momentum 24h
2
Posts
2
Origins
2
Source types
1
Duplicate ratio
0%
Why now
  • The vulnerability was recently disclosed, raising immediate security concerns.
  • It is currently unpatched, leaving systems exposed.
  • Awareness can prompt organizations to implement mitigations or monitor for exploitation.
Why it matters
  • NTLMv2 hash leakage can lead to credential theft and unauthorized access.
  • The vulnerability remains unpatched, increasing risk to Windows users.
  • Similar past vulnerabilities have been exploited, highlighting urgency for fixes.
LLM analysis
Topic mix: lowPromo risk: lowSource quality: medium
Recurring claims
  • An unpatched vulnerability in the Windows search URI handler can leak NTLMv2 hashes to attackers.
  • The vulnerability is similar to the previously patched CVE-2026-33829 affecting the Windows Snipping Tool's URI handler.
How sources frame it
  • Cybersecurity Researchers: neutral
This newly disclosed Windows vulnerability highlights ongoing risks in URI handlers that can expose authentication hashes, underscoring the need for timely patches and vigilance.
All evidence
All evidence
The Hacker News - Unpatched Windows Search URI Vulnerability Lets Attackers Steal...
thehackernews.com · thehackernews.com · 2026-06-03 10:18 UTC
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