EUVD-2026-73420
GHSA-hq65-299r-w75p
Severity by source
AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Matches provided vector: network-reachable but requires authenticated low-privileged attacker, active user interaction, and high-complexity conditions; full C/I/A reflects privilege escalation to system level.
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) document processing component enables an authenticated, low-privileged attacker to escalate privileges across a broad range of Windows versions from Server 2012 through Server 2025 and Windows 10/11. Exploitation requires user interaction and high attack complexity, limiting automated or opportunistic attacks despite the network attack vector. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) a low-privileged authenticated account on the target system or network (PR:L); (2) active user interaction such as opening or processing a crafted XPS document (UI:R); and (3) high attack complexity conditions that must be satisfied beyond simple packet delivery (AC:H) - the specific technical preconditions are not disclosed in available data but likely involve heap layout prerequisites or race conditions. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.1 base score reflects a network-accessible vulnerability tempered by high attack complexity (AC:H), mandatory user interaction (UI:R), and a low-privileged authentication prerequisite (PR:L). … 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 vendor-released patches via Windows Update or the Microsoft Update Catalog; fixed build numbers confirmed by EUVD are: 10.0.26100.33438 (Server 2025 / Windows 11 24H2), 10.0.26200.9445 (Windows 11 25H2), 10.0.28000.2954 (Windows 11 26H1), 10.0.22631.7582 (Windows 11 23H2), 10.0.19045.7725 (Windows 10 22H2), 10.0.19044.7725 (Windows 10 21H2), 10.0.17763.9245 (Server 2019 / Windows 10 1809), 10.0.14393.9512 (Server 2016 / Windows 10 1607), 10.0.20348.5622 (Server 2022), 6.3.9600.23397 (Server 2012 R2), and 6.2.9200.26349 (Server 2012). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory Windows 10, 11, and Server 2012-2025 deployments to identify systems that process XPS documents. …
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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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