CVE-2026-42832

⚠️ high

🔍 Scan for this CVE

Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally.

CVSS Score

7.7

High

EPSS Score

0.1

Exploit Probability

Published Date

2026-05-12

First Seen: 2026-05-17

This CVE is Moderate Risk - more severe than 69.7% of all 321,566 vulnerabilities in our database.

#97,378

Above average severity

Severity Percentile

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

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:N

CWE IDs (Weakness Types)

CWE-284

📦 Affected Products 5

Vendor	Product	Status	Affected Versions
microsoft	excel	Affected	< 16.0.19822.20190
microsoft	office	Affected	v2021
microsoft	office	Affected	v2024
microsoft	word	Affected	< 16.0.19822.20190
microsoft	office_long_term_servicing_channel	Affected	v2021

Vendor Advisory

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-40359	⚠️ high	7.8	0.1	Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.	2026-05-12
CVE-2026-40360	⚠️ high	7.8	0.1	Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.	2026-05-12
CVE-2026-40362	⚠️ high	7.8	0.1	Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.	2026-05-12
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-2026-35436	⚠️ 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

These CVEs affect the same products