CVE-2020-1503

Memory disclosure via mishandled in-memory objects

Published Aug 17, 2020 · Updated Aug 4, 2024

Information disclosure in Microsoft Word allows context-dependent attackers to read process memory via a crafted document file. Certain Word functions mishandle objects in memory and disclose their contents, but Microsoft has not identified the functions or erroneous operation. Exploitation requires a user to open the document and the attacker to know the object's memory address; no integrity or availability impact is reported.

CVSS severity5.5
Medium
EPSS probability4.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Microsoft Word allows context-dependent attackers to read process memory via a crafted document file. Certain Word functions mishandle objects in memory and disclose their contents, but Microsoft has not identified the functions or erroneous operation. Exploitation requires a user to open the document and the attacker to know the object's memory address; no integrity or availability impact is reported.

The record

CVE
CVE-2020-1503
Published
Aug 17, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
Microsoft Office 2019
Classifications
T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=19.0.0 <https://aka.ms/OfficeSecurityReleases

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Office 2019version=19.0.0 <https://aka.ms/OfficeSecurityReleases
Microsoft · Microsoft SharePoint Enterprise Server 2016version=16.0.0 <publication
Microsoft · Microsoft SharePoint Server 2010version=13.0.0.0 <publication
Microsoft · Microsoft SharePoint Enterprise Server 2013version=15.0.0 <publication
Microsoft · Microsoft SharePoint Server 2019version=16.0.0 <publication
Microsoft · Microsoft Office 2016 for Macversion=16.0.0 <publication
Microsoft · Microsoft Office 2019 for Macversion=16.0.0 <publication
Microsoft · Microsoft Office Web Apps 2010version=13.0.0 <publication
Microsoft · Microsoft Word 2013version=15.0.1 <publication
Microsoft · Microsoft Word 2016version=16.0.1 <publication
Microsoft · Microsoft Office Web Apps Server 2013version=15.0.0.0 <publication
Microsoft · Office Online Serverversion=16.0.1 <publication
Microsoft · Microsoft Office 2010version=13.0.0.0 <publication
Microsoft · Microsoft Word 2010version=13.0.0.0 <publication
Microsoft · Microsoft 365 Apps for enterpriseversion=16.0.1 <https://aka.ms/OfficeSecurityReleases

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1204.002User Execution Malicious 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo