EUVD-2026-73418
GHSA-rxp8-2ppx-x6fm
Severity by source
AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Network delivery of malicious XPS document (AV:N), heap exploitation requires specific conditions (AC:H), attacker must hold prior low-privileged access (PR:L), victim must open document (UI:R); successful exploitation yields full SYSTEM-level compromise (C:H/I:H/A:H) with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Microsoft Standard XPS allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Heap-based buffer overflow in Microsoft's Standard XPS (XML Paper Specification) component across Windows 10, Windows 11, and Windows Server versions from 2012 through 2025 enables a low-privileged authenticated attacker to escalate to full system control. Exploitation requires high attack complexity and active user interaction - consistent with a scenario where a specially crafted XPS document must be opened by the target. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already hold a low-privileged authenticated account on the target system or network (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.1 (AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H) accurately captures a meaningful exploitation barrier: the attacker must already hold low-level authenticated access (PR:L), the attack complexity is high (AC:H - heap exploitation requires specific memory layout or timing conditions to be reliable), and victim interaction is mandatory (UI:R). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft-released security update corresponding to your Windows version via Windows Update, WSUS, or SCCM. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify teams and departments that regularly handle XPS documents (engineering, design, printing operations) and prepare your update infrastructure for rapid deployment. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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