EUVD-2026-35575
GHSA-g73m-vgr6-fw8x
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Microsoft Office Click-To-Run stems from a use-after-free condition (CWE-416) that lets an authorized low-privilege user elevate to higher privileges on the host. The flaw, reported by Microsoft's MSRC, carries a CVSS 7.0 (AV:L/AC:H/PR:L) reflecting that exploitation requires local access, low privileges, and a successful race-window or memory-state condition. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires (1) local code execution as an authenticated low-privileged user on a Windows endpoint that has Microsoft Office installed via the Click-To-Run channel (the MSI/volume-license servicing path is not implicated by the component name), (2) the OfficeClickToRun service running and reachable for IPC from the attacker's session, which is its default state, and (3) winning the timing/state condition that drives the use-after-free, reflected in the CVSS AC:H rating. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate rather than urgent: the CVSS 7.0 reflects AV:L (local only), AC:H (high attack complexity - typically a race or specific memory state), and PR:L (the attacker must already have a low-privileged session), which together significantly narrow the exposed population to scenarios where an attacker has already executed code on the endpoint. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A user opens a malicious document or runs an attacker-supplied binary that gives the adversary low-privileged code execution on the workstation; the attacker then invokes the vulnerable Click-To-Run code path (typically via IPC to the privileged service) and wins the race that triggers the use-after-free, reclaiming the freed object with attacker-controlled data to hijack execution as SYSTEM. The result is full local elevation, enabling credential theft, persistence, and lateral movement from a previously sandboxed foothold. |
| Remediation | Apply the Microsoft Office Click-To-Run update referenced in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47293 - patch available per vendor advisory, but the exact fixed build was not supplied in this dataset, so administrators should pull the per-channel build numbers (Current, Monthly Enterprise, Semi-Annual Enterprise) from the MSRC page and confirm via 'File > Account > About' on endpoints. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Conduct complete software inventory to identify all Click-To-Run deployments; implement Group Policy restrictions limiting Click-To-Run functionality (disable or restrict to essential business processes); enable Windows Event Log monitoring for privilege escalation events (Event IDs 4672, 4688). …
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
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External POC / Exploit Code
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