What is CVE-2026-70105?

CVE-2026-70105 is a medium-severity vulnerability in Microsoft 365, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-08-20.

How severe is CVE-2026-70105?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Microsoft 365

CVE-2026-70105

Improper input validation in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-08-20 · last modified 2026-09-04.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.5th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.010 · change: +0.004

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

Microsoft Word Information Disclosure Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-70105?: CVE-2026-70105 is a medium-severity vulnerability in Microsoft 365, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-08-20.
How severe is CVE-2026-70105?: Medium severity. CVSS v3 base score is 6.5 out of 10.