EUVD-2026-73852
GHSA-8vjw-jph5-84g4
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File delivered over network, no auth needed, low complexity once crafted, but victim must open the document (UI:R); full C/I/A impact upon successful deserialization exploit.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Deserialization of untrusted data in Microsoft Office Publisher allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Office Publisher allows a network-based attacker to execute arbitrary code on a victim's machine by exploiting unsafe deserialization of untrusted data in Publisher file parsing. Affected products span the full Office ecosystem including Microsoft 365 Apps for Enterprise, Office LTSC 2024/2021, Publisher 2016, and Office 2019. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim actively open a crafted Publisher document - the CVSS UI:R metric confirms this mandatory user interaction, which must be obtained through social engineering (phishing, malicious web link, or physical media delivery). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H yields a base score of 8.8, accurately reflecting the combination of broad network delivery, low attack complexity, no required authentication, and full compromise potential 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 | Apply Microsoft's released patches via Windows Update or Microsoft Update Catalog immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running Microsoft 365 Apps for Enterprise, Office LTSC 2024, Office LTSC 2021, Office 2019, or Publisher 2016 and assess coverage across your infrastructure. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
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