EUVD-2026-73837
GHSA-8c8q-pc78-hfg8
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Network-delivered file triggers read-only memory disclosure upon user open; no integrity or availability impact applies, and no special conditions beyond file opening are required.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
AnalysisAI
Out-of-bounds memory read in Microsoft PowerPoint's file-parsing logic exposes sensitive process memory when a victim opens a specially crafted presentation file, allowing a remote unauthenticated attacker to disclose heap or stack contents. Affected builds span Microsoft 365 Apps for Enterprise, Office 2019, Office LTSC 2021, and Office LTSC 2024 on both Windows and macOS platforms. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation mandatorily requires a victim user to open a specially crafted PowerPoint presentation file; this is a hard prerequisite enforced by CVSS UI:R and confirmed by the SSVC Automatable:no rating, meaning mass automated exploitation is not feasible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.5 base score captures a realistic bounded threat: network-reachable without privileges but gated on user interaction (UI:R) and limited to confidentiality impact (C:H, I:N, A:N). … 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 through Microsoft Update or the Microsoft 365 Apps admin portal: update Microsoft 365 Apps for Enterprise to build 16.0.20326.20136 or later, Office LTSC 2021 to build 16.0.14334.20896 or later, Office 2019 to build 16.0.10417.20204 or later, and Office LTSC 2024 to build 16.0.17932.20960 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Information Disclosure
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External POC / Exploit Code
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