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Microsoft addresses security flaw in NLWeb protocol

A critical vulnerability in Microsoft’s NLWeb protocol has exposed sensitive files to remote users.

August 6, 2025 at 10:30 AM
blur Microsoft’s plan to fix the web with AI has already hit an embarrassing security flaw

Microsoft has faced backlash over a vulnerability in its new NLWeb protocol that exposes sensitive files.

Microsoft's NLWeb vulnerability highlights serious security risks in AI

Microsoft's newly introduced NLWeb protocol has been found to contain a significant security flaw that allows remote users to access sensitive files, including confidential API keys. The vulnerability, identified by security researchers Aonan Guan and Lei Wang, is notably a classic path traversal flaw, which is alarmingly simple to exploit. This defect was revealed shortly after NLWeb's launch, raising concerns about Microsoft's security protocols. Although Microsoft has addressed the issue with a patch, the absence of a listed CVE raises questions about transparency and accountability in response to security threats.

Key Takeaways

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Microsoft's NLWeb protocol has a severe security vulnerability
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Remote users can exploit the flaw to read sensitive files
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The flaw underscores classic vulnerabilities in modern AI systems
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A CVE for the issue has not been issued, raising concerns
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API keys leaked could lead to massive financial loss
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Microsoft must prioritize security alongside AI feature rollout

"This issue was responsibly reported and we have updated the open-source repository."

Microsoft spokesperson responding to the NLWeb flaw report.

"This case study serves as a critical reminder that we must re-evaluate the impact of classic vulnerabilities."

Aonan Guan emphasizes the implications of vulnerabilities for AI systems.

The discovery of the NLWeb vulnerability is a stark reminder of the security challenges companies face as they push forward with AI innovations. The flaw's ease of exploitation presents a risk not only to individual users but also to broader AI systems that rely on the integrity of sensitive data. As Microsoft continues to prioritize rapid deployment of AI technologies, it must ensure that rigorous security assessments are integrated into its development processes. Failing to do so could jeopardize both user trust and the effectiveness of AI systems.

Highlights

  • A classic flaw in AI could compromise its very essence.
  • When AI collides with basic security flaws, the risks multiply.
  • Neglecting basic security in AI systems is a recipe for disaster.
  • API keys mean more than credentials; they are the thinking power of AI.

Concerns over Microsoft’s security practices

The oversight in addressing a classic security flaw in a major AI protocol raises significant concerns about Microsoft’s security protocols and handling of vulnerabilities. Failure to issue a CVE may hinder awareness and response to the fix.

Microsoft's approach to security in AI development will face increasing scrutiny in the future.

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