CVE-2020-0653

Code execution via improper object handling

Published Jan 14, 2020 · Updated Aug 4, 2024

Object-handling flaw in Microsoft Excel in Microsoft 365 Apps for enterprise allows attackers to execute code via user-opened content. Excel improperly handles objects in memory while processing the content, but Microsoft has not disclosed the affected parser or erroneous memory operation. Opening attacker-controlled content is required, and successful exploitation runs code in the current user's security context.

CVSS severity7.8
High
EPSS probability20.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Object-handling flaw in Microsoft Excel in Microsoft 365 Apps for enterprise allows attackers to execute code via user-opened content. Excel improperly handles objects in memory while processing the content, but Microsoft has not disclosed the affected parser or erroneous memory operation. Opening attacker-controlled content is required, and successful exploitation runs code in the current user's security context.

The record

CVE
CVE-2020-0653
Published
Jan 14, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
Microsoft 365 Apps for enterprise
Classifications
T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 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=32-bit Systems
  2. Affected versionversion=64-bit Systems

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft 365 Apps for enterpriseversion=32-bit Systems; version=64-bit Systems

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 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

T1203Exploitation for Client Execution
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

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Your stack

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