CVE-2026-85875: Microsoft Office Excel Information Disclosure Vulnerability
Vulnerability summary
CVE-2026-85875 is a medium (CVSS 5.5) Out-of-bounds Read vulnerability in microsoft 365_apps. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 45.8% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Timeline
- 08-09-2026PublishedVulnerability first disclosed.
- 10-11-2026Last modifiedVulnerability information updated.
Description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS trend
Probability
0.54%
Chance of exploitation in the next 30 days
Percentile
46%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.54% on 11-10-2026
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
Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Microsoft16 products
- 365_appsna
- excel2016
- microsoft_365na
- microsoft 365 apps for enterprise≥ 16.0.1, < 16.0.20326.20138
- microsoft excel 2016≥ 16.0.0.0, < 16.0.5569.1003
1 vendor · 16 products
