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CVE-2026-49160 Microsoft CVE debrief

CVE-2026-49160 is a HIGH severity vulnerability with a CVSS score of 7.5. The vulnerability is caused by uncontrolled resource consumption in HTTP/2, which allows an unauthorized attacker to deny service over a network. The vulnerability affects multiple Microsoft products, including Windows 10, Windows 11, and Windows Server.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-10
Advisory published
2026-06-09
Advisory updated
2026-06-10

Who should care

Administrators and users of affected Microsoft products should be aware of this vulnerability and take necessary steps to mitigate it.

Technical summary

The vulnerability is caused by uncontrolled resource consumption in HTTP/2, which allows an unauthorized attacker to deny service over a network. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Defensive priority

HIGH

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to vulnerable systems.
  • Refer to vendor advisory for more information: [ref-4](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49160)

Evidence notes

The vulnerability is analyzed and has a CWE-400 weakness.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49160 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49160

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-49160 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49160

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.