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Description

Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.

PUBLISHED Reserved 2026-05-18 | Published 2026-06-09 | Updated 2026-06-10 | Assigner microsoft




CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

CWE-190: Integer Overflow or Wraparound

CWE-122: Heap-based Buffer Overflow

Product status

10.0.14393.0 (custom) before 10.0.14393.9234
affected

10.0.17763.0 (custom) before 10.0.17763.8880
affected

10.0.19044.0 (custom) before 10.0.19044.7417
affected

10.0.19045.0 (custom) before 10.0.19045.7417
affected

10.0.22631.0 (custom) before 10.0.22631.7219
affected

10.0.22631.0 (custom) before 10.0.22631.7219
affected

10.0.26100.0 (custom) before 10.0.26100.8655
affected

10.0.26200.0 (custom) before 10.0.26200.8655
affected

10.0.28000.0 (custom) before 10.0.28000.2269
affected

6.2.9200.0 (custom) before 6.2.9200.26132
affected

6.2.9200.0 (custom) before 6.2.9200.26132
affected

6.3.9600.0 (custom) before 6.3.9600.23228
affected

6.3.9600.0 (custom) before 6.3.9600.23228
affected

10.0.14393.0 (custom) before 10.0.14393.9234
affected

10.0.14393.0 (custom) before 10.0.14393.9234
affected

10.0.17763.0 (custom) before 10.0.17763.8880
affected

10.0.17763.0 (custom) before 10.0.17763.8880
affected

10.0.20348.0 (custom) before 10.0.20348.5256
affected

10.0.26100.0 (custom) before 10.0.26100.32995
affected

10.0.26100.0 (custom) before 10.0.26100.32995
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47291 (HTTP.sys Remote Code Execution Vulnerability) vendor-advisory patch

cve.org (CVE-2026-47291)

nvd.nist.gov (CVE-2026-47291)

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