EUVD-2026-73718
GHSA-qqv7-39xg-j9hj
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
File-parsing trigger requires user to open crafted document (UI:R, PR:N); over-read is read-only memory leak (C:H, I:N, A:N) with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Buffer over-read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
AnalysisAI
Buffer over-read (CWE-126) in Microsoft Office exposes process memory contents to remote unauthenticated attackers when a victim opens a maliciously crafted Office document. The vulnerability spans a wide range of Office product lines across both Windows and macOS - including Office 2016, 2019, LTSC 2021/2024, Microsoft 365 Apps for Enterprise, and the macOS Office 365/LTSC equivalents. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively open a specially crafted Office document; this user interaction is confirmed by the CVSS UI:R metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 6.5 with vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N captures the key risk trade-offs well: the attack is network-accessible, low-complexity, and requires no attacker credentials, but mandatory user interaction (opening a crafted file) provides a meaningful friction point. … 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 for the applicable Office product line via Microsoft Update or the Microsoft Security Response Center (https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69626). … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-126 – Buffer Over-read
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External POC / Exploit Code
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