CVEFinder.io

CVE-2026-40367

⚠️ high
🔍 Scan for this CVE
Summary

Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVSS Score
8.4
High
EPSS Score
0.1
Exploit Probability
Published Date
2026-05-12
First Seen: 2026-05-20
📊 Relative Risk Intelligence

This CVE is High Risk - more severe than 80.3% of all 321,566 vulnerabilities in our database.

#63,257
Top 25% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: May 7, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
SSVC data provided by CISA
Last Modified 2026-05-19
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)
CWE-822

📦 Affected Products 8

Vendor Product Status Affected Versions
microsoft office Affected
v2019
microsoft word Affected
v2016
microsoft sharepoint_server Affected
< 16.0.19725.20280
microsoft sharepoint_server Affected
v2016
microsoft sharepoint_server Affected
v2019
microsoft 365_apps Affected
v-
microsoft office_long_term_servicing_channel Affected
v2021
microsoft office_long_term_servicing_channel Affected
v2024

🔗 References 1

https://msrc.microsoft.com/update-guide/vulnerabilit...
Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-40421 🔶 medium 4.3 0.1 External control of file name or path in Microsoft Office Word allows an unauthorized attacker to disclose information o... 2026-05-12
CVE-2026-42831 ⚠️ high 7.8 0.1 Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally. 2026-05-12
CVE-2026-42832 ⚠️ high 7.7 0.1 Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally. 2026-05-12
CVE-2026-35436 ⚠️ high 8.8 0.1 Insufficient granularity of access control in Microsoft Office Click-To-Run allows an authorized attacker to elevate pri... 2026-05-12
CVE-2026-35440 🔶 medium 5.5 0.0 Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized attacker to disclose... 2026-05-12
CVE-2026-40358 ⚠️ high 8.4 0.1 Use after free in Microsoft Office allows an unauthorized attacker to execute code locally. 2026-05-12
These CVEs affect the same products