CVE-2026-70318 | BDVDB-2026-357933 Detail

MicrosoftMicrosoft 365 Apps for Enterprise

Description#

Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

Per CVSS v3.1: confidentiality impact high, integrity impact none, availability impact none. Attack vector: local.

No public exploit known

5.5 Medium

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 45.8.

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Improper Input Validation

No specific action is recorded in the source data. Check the references for vendor guidance.

Vulnerable
>= 16.0.1 and < https://aka.ms/OfficeSecurityReleases
Fixed
https://aka.ms/OfficeSecurityReleases

Not available

5.5 Medium

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

Not available

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).