CVE-2020-0852

Code execution via crafted file memory corruption

Published Mar 12, 2020 · Updated Aug 4, 2024

Memory corruption in Microsoft Word components in Office, SharePoint Server, and Office Online Server allows remote attackers to execute code. Microsoft has disclosed only that Word mishandles objects in memory when processing a crafted file; no file format or faulty routine is public. Viewing the file in the Preview Pane is sufficient, and resulting code runs with the logged-on user's permissions.

CVSS severity7.8
High
EPSS probability11.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Microsoft Word components in Office, SharePoint Server, and Office Online Server allows remote attackers to execute code. Microsoft has disclosed only that Word mishandles objects in memory when processing a crafted file; no file format or faulty routine is public. Viewing the file in the Preview Pane is sufficient, and resulting code runs with the logged-on user's permissions.

The record

CVE
CVE-2020-0852
Published
Mar 12, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
Microsoft Office
Classifications
T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2016 for Mac
  2. Affected versionversion=2019 for 32-bit editions
  3. Affected versionversion=2019 for 64-bit editions

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Officeversion=2016 for Mac; version=2019 for 32-bit editions; version=2019 for 64-bit editions
Microsoft · Microsoft SharePoint Serverversion=2019
Microsoft · Microsoft Office Online Serverversion=unspecified

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.3NIST NVDAV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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