CVE-2026-20956

CWE-8225 documents5 sources
Severity
7.8HIGH
EPSS
0.1%
top 78.06%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
Microsoft Microsoft 365 Apps FOR EnterpriseMicrosoft Microsoft Office Ltsc 2021Microsoft Microsoft Office Ltsc 2024+3 more
Timeline
PublishedJan 13

Description

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

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages6 packages

▶CVEListV5microsoft/microsoft_office_ltsc_202116.0.1 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_202416.0.0 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_for_mac_202116.0.1 — 16.105.26011018
▶CVEListV5microsoft/microsoft_office_ltsc_for_mac_202416.0.0 — 16.105.26011018

🔴Vulnerability Details

2
GHSA
GHSA-v6cw-63j5-79wf: Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally↗2026-01-13
▶
CVEList
Microsoft Excel Remote Code Execution Vulnerability↗2026-01-13
▶

📋Vendor Advisories

1
Microsoft
Microsoft Excel Remote Code Execution Vulnerability↗2026-01-13
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-20956 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶