8.4

CVE-2026-40367: microsoft 365_apps Untrusted Pointer Dereference

CVSS: 8.4v3.1HighModified
Published 12-05-2026Last modified 10-08-2026
Open JSON

Vulnerability summary

CVE-2026-40367 is a high (CVSS 8.4) Untrusted Pointer Dereference vulnerability in microsoft 365_apps. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.4% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.45%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-05-2026
    PublishedVulnerability first disclosed.
  2. 10-08-2026
    Last modifiedVulnerability information updated.

Description

Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

-0.01 pp

From 0.45% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft15 products

1 vendor · 15 products

References

1 links