EUVD-2026-73445
GHSA-73g8-42xq-36g9
Severity by source
AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Network delivery of crafted XPS artifact, low privilege required, user must open document, high complexity for heap conditions; full triad on successful exploitation, scope unchanged.
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 the Microsoft Standard XPS (XML Paper Specification) subsystem allows a low-privileged authenticated attacker to escalate to full system-level privileges across a broad range of Windows versions. The flaw (CWE-122) requires high attack complexity and user interaction, making opportunistic mass exploitation less likely, but the full C:H/I:H/A:H impact on successful exploitation is severe. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold at least low-level network authentication (PR:L) - anonymous, unauthenticated exploitation is not indicated by the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 7.1 with vector AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H reflects a meaningful but constrained exploitation scenario. … 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 cumulative updates that bring each affected Windows build to or above the fixed version thresholds listed in the affected products section. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and catalog all Windows systems in your environment and prioritize those where users process XML Paper Specification documents or receive documents from external sources. …
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Threat intelligence, references, and detailed analysis are available after sign-in.
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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