EUVD-2026-35541
GHSA-chvc-7qm7-3qgf
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Lifecycle Timeline
1DescriptionCVE.org
Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
AnalysisAI
Excel across multiple Microsoft Office product lines fails to properly enforce an internal protection mechanism, enabling a local attacker to bypass a security feature and access limited confidential data within the process context. Affected builds span Microsoft 365 Apps for Enterprise, Office LTSC 2024, and Mac variants of Office. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector specifies AV:L (local attack vector) and UI:R (user interaction required), meaning the victim must explicitly open a crafted Excel file on the affected system - the attacker cannot trigger exploitation remotely or silently. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.3 (Low) score accurately reflects the constrained impact profile: local attack vector, user interaction required, confidentiality-only impact at low severity, and no integrity or availability consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Excel file and delivers it to a target user via phishing email or a shared network location. When the victim opens the file - providing the required user interaction - Excel's protection mechanism fails to enforce the security boundary, allowing the attacker to access limited confidential data within the local Excel process context. … |
| Remediation | Apply the Microsoft security update referenced at https://aka.ms/OfficeSecurityReleases, which addresses Microsoft 365 Apps for Enterprise (builds above 16.0.1) and Microsoft Office LTSC 2024 (builds above 16.0.0). … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-693 – Protection Mechanism Failure
View allSame technique Authentication Bypass
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External POC / Exploit Code
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