CVE-2026-85816 Microsoft CVE debrief

Who should care

Defenders responsible for Windows systems, particularly those managing network security and patch management, should assess exposure and prioritize patching.

Why it matters

CVE-2026-85816 is a Windows Wi-Fi Driver Information Disclosure Vulnerability. Defenders should verify and apply patches from Microsoft, as the vulnerability allows information disclosure over an adjacent network. This requires attention from those managing Windows systems, especially in terms of network security and patch management.

• Verify patches are applied to prevent information disclosure.
• Monitor network activity for potential exploitation attempts.
• Inventory systems for vulnerability exposure.

Technical summary

The Windows Wi-Fi Driver Information Disclosure Vulnerability (CVE-2026-85816) is caused by an out-of-bounds read in the Windows Wi-Fi Driver. This vulnerability allows an authorized attacker to disclose information over an adjacent network. The vulnerability impacts Windows systems, particularly those managing network security and patch management. Defenders should prioritize verifying and applying patches from Microsoft.

Defensive priority

Defenders should prioritize verifying and applying patches from Microsoft, as the vulnerability allows information disclosure over an adjacent network.

Recommended defensive actions

• Verify and apply patches from Microsoft for the Windows Wi-Fi Driver Information Disclosure Vulnerability.
• Inventory Windows systems to identify potential exposure.
• Monitor network activity for unusual patterns that could indicate exploitation attempts.

Evidence notes

The CVE Program and NVD provide official records of the vulnerability. Microsoft has released a patch for this vulnerability. The vulnerability allows information disclosure over an adjacent network. Defenders should verify and apply patches from Microsoft. The official CVE Program record and NVD detail page provide source-provided CVE metadata and vulnerability assessment. A source item from cve_program_cvelist_v5 and a supplemental source reference are also available.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.