EUVD-2026-73364
GHSA-x6mr-3h76-c73m
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Unauthenticated network-accessible heap overflow in a SYSTEM-privilege service; UI:R is the sole limiting factor preventing wormable scoring.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Print Spooler Components allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Windows Print Spooler Components (Windows 11 24H2, build < 10.0.26100.9445) via a heap-based buffer overflow triggered over the network. An unauthenticated remote attacker can exploit this by delivering a maliciously crafted print-related payload that a victim user must interact with, resulting in full C:H/I:H/A:H compromise of the target system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | User interaction is required (CVSS UI:R): the victim must perform an action that causes the Print Spooler to process attacker-controlled data - for example, opening a document that auto-selects a printer, connecting to a rogue print server via UNC path, or accepting a printer installation prompt. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.8 with AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H reflects a high-severity but not wormable vector - UI:R prevents fully autonomous spread and limits drive-by exploitation to scenarios requiring user action (e.g., opening a document that triggers a print operation, or a user connecting to a malicious print server). … 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 | Vendor-released patch: Windows 11 24H2 build 10.0.26100.9445 or later, available via Windows Update and the Microsoft Update Catalog; consult the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85877 for the specific KB number and download links. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Windows 11 24H2 systems in your environment, documenting build versions and systems handling external print jobs or user-accessible printing services. …
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View allSame technique Buffer Overflow
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External POC / Exploit Code
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