EUVD-2026-73554
GHSA-r992-8whj-x453
Severity by source
AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Network vector confirmed by 'over a network' in description; AC:H reflects UAF timing complexity; PR:L matches 'authorized attacker'; full CIA impact reflects successful privilege escalation outcome.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows PrintWorkflowUserSvc allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Privilege escalation in Windows PrintWorkflowUserSvc affects a broad range of Windows 10, 11, and Server editions through a use-after-free memory corruption condition reachable over a network. A low-privileged authenticated attacker can exploit the vulnerability under high-complexity conditions that require user interaction, ultimately achieving C:H/I:H/A:H impact at an elevated privilege level. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privileged authenticated network account (PR:L - the description uses 'authorized attacker'), a high-complexity attack condition consistent with UAF race or timing exploitation (AC:H), and user interaction to trigger the vulnerable print workflow code path (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.1 score appropriately reflects real-world complexity constraints on this vulnerability. … 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 patches bringing each affected Windows installation to or above the following confirmed fixed builds: Windows 10 1809 and Server 2019 to 10.0.17763.9245, Windows 10 21H2 to 10.0.19044.7725, Windows 10 22H2 to 10.0.19045.7725, Windows 11 23H2 to 10.0.22631.7582, Windows 11 24H2 to 10.0.26100.9445, Windows 11 25H2 to 10.0.26200.9445, Windows 11 26H1 to 10.0.28000.2954, Windows Server 2022 to 10.0.20348.5622, and Windows Server 2025 to 10.0.26100.33438. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, 11, and Server 2019/2022 systems in your environment and identify patch status for PrintWorkflowUserSvc updates. …
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Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
Leaving vuln.today