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CVE-2026-21250

Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7945f57f84c1d77732f317ec03652d7cb59ba6bf1e052446d8b8e55bf2570a77
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 7 assertions

{"platforms":["x64-based Systems"],"product":"Windows Server 2025","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.32370","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/5

{"product":"Windows 11 Version 26H1","vendor":"Microsoft","versions":[{"lessThan":"10.0.28000.1575","status":"affected","version":"10.0.28000.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/3

{"platforms":["ARM64-based Systems","x64-based Systems"],"product":"Windows 11 Version 24H2","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.7840","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/0

{"product":"Windows 11 Version 25H2","vendor":"Microsoft","versions":[{"lessThan":"10.0.26200.7840","status":"affected","version":"10.0.26200.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/1

{"platforms":["x64-based Systems"],"product":"Windows Server 2022, 23H2 Edition (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.25398.2149","status":"affected","version":"10.0.25398.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/4

{"platforms":["x64-based Systems"],"product":"Windows Server 2025 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.32370","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/6

{"platforms":["ARM64-based Systems"],"product":"Windows 11 version 26H1","vendor":"Microsoft","versions":[{"lessThan":"10.0.28000.1575","status":"affected","version":"10.0.28000.0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/2

Affected products and versions

7 source assertions
{"platforms":["x64-based Systems"],"product":"Windows Server 2025","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.32370","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/5
{"product":"Windows 11 Version 26H1","vendor":"Microsoft","versions":[{"lessThan":"10.0.28000.1575","status":"affected","version":"10.0.28000.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/3
{"platforms":["ARM64-based Systems","x64-based Systems"],"product":"Windows 11 Version 24H2","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.7840","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/0
{"product":"Windows 11 Version 25H2","vendor":"Microsoft","versions":[{"lessThan":"10.0.26200.7840","status":"affected","version":"10.0.26200.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/1
{"platforms":["x64-based Systems"],"product":"Windows Server 2022, 23H2 Edition (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.25398.2149","status":"affected","version":"10.0.25398.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/4
{"platforms":["x64-based Systems"],"product":"Windows Server 2025 (Server Core installation)","vendor":"Microsoft","versions":[{"lessThan":"10.0.26100.32370","status":"affected","version":"10.0.26100.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/6
{"platforms":["ARM64-based Systems"],"product":"Windows 11 version 26H1","vendor":"Microsoft","versions":[{"lessThan":"10.0.28000.1575","status":"affected","version":"10.0.28000.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-822","description":"CWE-822: Untrusted Pointer Dereference","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"Windows HTTP.sys Elevation of Privilege Vulnerability","tags":["vendor-advisory","patch"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21250"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d1f17e75da9e36188dc0208ad7d257a921c10f7a3e10adcb0ef64970ca198ff4 · sha256:fce4522e8ad505a0… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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