EUVD-2026-73836
GHSA-qhh9-2fqg-hwxq
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network delivery via email (AV:N), no attacker credentials needed (PR:N), user must open content (UI:R), full code execution impact on the Office process (C:H/I:H/A:H), no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution via use-after-free (CWE-416) in Microsoft Office Outlook allows a network-based attacker to execute arbitrary code on a victim's system when the user opens or previews malicious content. The vulnerability affects a broad range of Microsoft Office versions across Windows and macOS, including Microsoft 365 Apps for Enterprise, Office LTSC 2021/2024, Office 2019, and Word 2016. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to open or preview a maliciously crafted email or attachment within Microsoft Outlook (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) accurately captures the severity: network-accessible attack path, low complexity, no attacker-side authentication, full confidentiality/integrity/availability impact on the vulnerable system. … 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 is available via Microsoft Update. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Outlook and Office installations across your environment, including Microsoft 365 Apps for Enterprise, Office LTSC 2021/2024, Office 2019, and Word 2016 on Windows and macOS platforms, and retrieve the vendor-released patch from Microsoft's security advisory. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
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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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