CVE-2020-1229Network attack vector

IP address disclosure via remote image loading

Published Jun 9, 2020 · Updated Aug 4, 2024

Security feature bypass in Microsoft Outlook in Office, Word, and Microsoft 365 Apps releases allows remote attackers to disclose a host IP address. Outlook processes a specially crafted image without enforcing configured remote-content restrictions, causing an external image resource to load. Exploitation requires the recipient to open the crafted image; the outbound request exposes the targeted system's IP address, with no reported data modification or service interruption.

CVSS severity4.3
Medium
EPSS probability3.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Security feature bypass in Microsoft Outlook in Office, Word, and Microsoft 365 Apps releases allows remote attackers to disclose a host IP address. Outlook processes a specially crafted image without enforcing configured remote-content restrictions, causing an external image resource to load. Exploitation requires the recipient to open the crafted image; the outbound request exposes the targeted system's IP address, with no reported data modification or service interruption.

The record

CVE
CVE-2020-1229
Published
Jun 9, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
Microsoft Word
Classifications
T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 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=2010 Service Pack 2 (32-bit editions)
  2. Affected versionversion=2010 Service Pack 2 (64-bit editions)
  3. Affected versionversion=2013 RT Service Pack 1
  4. Affected versionversion=2013 Service Pack 1 (32-bit editions)
  5. Affected versionversion=2013 Service Pack 1 (64-bit editions)
  6. Affected versionversion=2016 (32-bit edition)
  7. Affected versionversion=2016 (64-bit edition)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Wordversion=2010 Service Pack 2 (32-bit editions); version=2010 Service Pack 2 (64-bit editions); version=2013 RT Service Pack 1; version=2013 Service Pack 1 (32-bit editions); version=2013 Service Pack 1 (64-bit editions); version=2016 (32-bit edition); version=2016 (64-bit edition)
Microsoft · Microsoft Officeversion=2010 Service Pack 2 (32-bit editions); version=2010 Service Pack 2 (64-bit editions); version=2013 RT Service Pack 1; version=2013 Service Pack 1 (32-bit editions); version=2013 Service Pack 1 (64-bit editions); version=2016 (32-bit edition); version=2016 (64-bit edition); version=2016 for Mac; version=2019 for 32-bit editions; version=2019 for 64-bit editions; version=2019 for Mac
Microsoft · Microsoft 365 Apps for enterpriseversion=unspecified

Published CVSS scores

4.0NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/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)
Vectornetwork
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

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Your stack

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