CVSS 3.1
8.8 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HCVE-2026-118295 Microsoft Office Excel Remote Code Execution Vulnerability
High (8.8) in microsoft. EPSS 0.9% estimated probability of exploitation activity in the next 30 days.
On this page
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Severity
- EPSS
- 0.9% estimated probability of exploitation activity in the next 30 days; 62nd percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWEs
- CWE-121 Stack-based Buffer Overflow
CWE-190 Integer Overflow or Wraparound (Year 2038 problem, Y2K38, Y2038, Epochalypse) - Published
- Modified
- Assigned by
- microsoft (CNA)
- NVD analysis
- Analyzed
- Record from
- the NVD, synced
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Affected
- microsoft:365_apps
- microsoft:microsoft_365
- microsoft:office_2021
- microsoft:office_2024
- microsoft:office_online_server
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Microsoft 365 Apps for Enterprise | from 16.0.1 before https://aka.ms/OfficeSecurityReleases |
| Microsoft Office 365 for Mac | from 1.0.0 before 16.115.26110837 |
| Microsoft Office LTSC 2021 | from 16.0.1 before 16.0.14334.21048 |
| Microsoft Office LTSC 2024 | from 16.0.0 before 16.0.17932.21140 |
| Microsoft Office LTSC for Mac 2021 | from 16.0.1 before 16.115.26110837 |
| Microsoft Office LTSC for Mac 2024 | from 16.0.0 before 16.115.26110837 |
| Microsoft Office Online Server | from 16.0.0.0 before 16.0.10417.20236 |
Fix and patched versions
- Patch: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118295
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118295
Attack patterns (CAPEC)
- CAPEC-92 Forced Integer Overflow Likelihood: High · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.
History
- Analyzed by the NVD
Changes since this site first stored the record. The same for every record: /api/public/changes.