CVE-2023-33153: Microsoft Outlook Remote Code Execution Vulnerability
Modified
Published 11-07-2023Last modified 28-02-2025
Vulnerability summary
CVE-2023-33153 is a high (CVSS 8.8) Use After Free vulnerability in microsoft 365_apps. EPSS estimates a 1.01% chance of exploitation in the next 30 days, higher than 62.8% of scored vulnerabilities.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
1.01%
0%100%
Low · -0.01 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Timeline
- 11-07-2023PublishedVulnerability first disclosed.
- 28-02-2025Last modifiedVulnerability information updated.
Description
Microsoft Outlook Remote Code Execution Vulnerability
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HSources2 sources · 6.8–8.8
- CVE.orgCNA6.8MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H/E:U/RL:O/RC:CDiffers
EPSS trend
Probability
1.01%
Chance of exploitation in the next 30 days
Percentile
63%
Versus all other CVEs
30-day change
Decrease -0.01 pp
From 1.02% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft8 products
- 365_appsna
- microsoft 365 apps for enterprise≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases
- microsoft office 2013 service pack 1≥ 15.0.0, < 15.0.5571.1000
- microsoft office 2016≥ 16.0.0, < 16.0.5404.1000
- microsoft office 2019≥ 19.0.0, < https://aka.ms/OfficeSecurityReleases
1 vendor · 8 products
