EUVD-2026-44012
GHSA-vx5p-mmvv-8qvc
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local authorized user (AV:L, PR:L) triggers a low-complexity double free with no interaction, yielding full SYSTEM-level compromise (C/I/A:H); no scope change as the driver runs in the same security authority.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Double free in Microsoft Printer Drivers allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Microsoft Printer Drivers component across Windows 10, Windows 11 (through 26H1), and Windows Server 2012 through 2025 lets an already-authenticated attacker corrupt kernel-adjacent memory to gain higher privileges. The flaw is a double free (CWE-415) triggered locally by a low-privileged user, yielding high confidentiality, integrity, and availability impact (CVSS 7.8). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires local, authenticated access: the attacker must already run code as a low-privileged user on the target host (CVSS PR:L, AV:L), so this cannot be launched remotely or unauthenticated. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, score 7.8) describes a locally-exploitable, low-complexity flaw requiring low privileges and no user interaction, with full CIA impact but no scope change - a classic local EoP profile rather than a remote-facing emergency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who already has a low-privileged local account (for example, via phishing, a compromised service, or a standard user session) invokes the vulnerable printer driver code path to trigger the double free, grooms the heap so the freed allocation is reused with attacker-controlled data, and escalates to SYSTEM-level privileges. No user interaction is required and attack complexity is low, but the attacker must first be present on the machine. … |
| Remediation | Vendor-released patch: apply the Microsoft security update for CVE-2026-55004 as documented at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55004, selecting the KB/build that matches each affected Windows client and Server SKU (including Server Core). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Windows 10, Windows 11, and Windows Server 2012-2025 systems in your environment, then assess which have printer drivers deployed or printing functionality enabled. …
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Same weakness CWE-415 – Double Free
View allSame technique Information Disclosure
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External POC / Exploit Code
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