Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to elevate privileges locally.
References
| Link | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21259 | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
11 Feb 2026, 19:12
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Microsoft excel
Microsoft office Microsoft 365 Apps Microsoft Microsoft office Long Term Servicing Channel Microsoft office Online Server |
|
| CWE | CWE-787 | |
| CPE | cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:* cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:* cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:* cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:* cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:* cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:* cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:* cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:* cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:* cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:* cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:* |
|
| References | () https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21259 - Vendor Advisory |
10 Feb 2026, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-02-10 18:16
Updated : 2026-02-11 19:12
NVD link : CVE-2026-21259
Mitre link : CVE-2026-21259
CVE.ORG link : CVE-2026-21259
JSON object : View
Products Affected
microsoft
- 365_apps
- excel
- office
- office_online_server
- office_long_term_servicing_channel