CVE-2023-36766: microsoft 365_apps Out-of-bounds Read
CVSS: 7.8v3.1HighModified
Published 12-09-2023Last modified 30-10-2025
Vulnerability summary
CVE-2023-36766 is a high (CVSS 7.8) Out-of-bounds Read vulnerability in microsoft 365_apps. EPSS estimates a 1.23% chance of exploitation in the next 30 days, higher than 68.6% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
1.23%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 12-09-2023PublishedVulnerability first disclosed.
- 30-10-2025Last modifiedVulnerability information updated.
Description
Microsoft Excel Information Disclosure Vulnerability
CVSS metrics
2 scores · 2 sources · 1 versionHigh 7.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSources2 sources · 5.5–7.8
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NDiffers
EPSS trend
Probability
1.23%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
0.00 pp
From 1.23% on 21-09-2026
21-09-202621-10-2026
EPSS score1.23%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft13 products
- 365_appsna
- excel2013:sp1 | 2016
- microsoft 365 apps for enterprise≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases
- microsoft excel 2013 service pack 1≥ 15.0.0.0, < 15.0.5589.1000
- microsoft excel 2016≥ 16.0.0.0, < 16.0.5413.1000
1 vendor · 13 products
