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Not in CISA KEV
HIGH severity

CVE-2026-119992 — Microsoft

HIGH

CVE-2026-119992 is a high-severity (CVSS 7) CWE-415 vulnerability. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Double free in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.

Published
Updated
Affected
—
Patched
—
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

Double free in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    The records we use list no fixed release for CVE-2026-119992. Check the upstream advisory for a patched version, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

Double free in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.
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