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CVE-2023-33131

39
FAUCET Score

CVE-2023-33131 is a Microsoft Outlook Remote Code Execution vulnerability affecting Microsoft Office and Outlook products. With a CVSS score of 8.8 (High), it can be exploited remotely with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability if a user is tricked into interacting with a malicious email. While not currently listed in CISA's KEV catalog, a public exploit (EDB-51574) exists, and it has garnered significant community discussion and media coverage, indicating a high level of awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
2019CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
2019CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*
2021CPE matchmatch criteria
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:x64:*
2021CPE matchmatch criteria
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:x86:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.72%
Probability of exploitation in next 30 days
EPSS Percentile
92.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-51574 · Jul 7, 2023
This CVE's current EPSS score of 0.0572 is in the 92nd percentile among its peer group of 14,855 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (12)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for 32-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for 64-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft 365 Apps for Enterprise for 32-bit SystemsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft 365 Apps for Enterprise for 64-bit SystemsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft Office LTSC 2021 for 64-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft Office LTSC 2021 for 32-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2016 (32-bit edition)Fixed in: 16.0.5400.1000
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2016 (64-bit edition)Fixed in: 16.0.5400.1000
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2013 (32-bit editions)Fixed in: 15.0.5563.1000
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2013 (64-bit editions)Fixed in: 15.0.5563.1000
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2013 RT Service Pack 1Fixed in: 15.0.5563.1000

Vendor Advisories (1)

microsoft2023-Jun/CVE-2023-33131Important

Microsoft Outlook Remote Code Execution Vulnerability

Jun 13, 2023

References

packetstormsecurity.com / files/173361/Microsoft-365-MSO-2306-Build-16.0.16529.20100-Remote-Code-Execution.html
msrc.microsoft.com / update-guide/vulnerability/CVE-2023-33131
PatchVendor Advisory