CVE-2026-45460: microsoft 365_apps Buffer Over-read
CVSS: 4.7v3.1MediumModified
Published 09-06-2026Last modified 24-09-2026
Vulnerability summary
CVE-2026-45460 is a medium (CVSS 4.7) Buffer Over-read vulnerability in microsoft 365_apps. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 34.5% of scored vulnerabilities.
CVSS score
4.7/10
010
Medium · v3.1 (CVE.org)EPSS score
0.42%
0%100%
Low · +0.05 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-06-2026PublishedVulnerability first disclosed.
- 24-09-2026Last modifiedVulnerability information updated.
Description
Buffer over-read in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVSS metrics
2 scores · 2 sources · 1 versionMedium 4.7Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST4.7MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
+0.05 pp
From 0.37% on 20-09-2026
20-09-202620-10-2026
EPSS score0.42%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft14 products
- 365_appsna
- 365_copilotna
- microsoft_365na
- microsoft 365 apps for enterprise≥ 16.0.1, < https://aka.ms/OfficeSecurityReleases
- microsoft office 2019≥ 19.0.0, < https://aka.ms/OfficeSecurityReleases
1 vendor · 14 products
