Vulnerability details
CVE-2026-23657
Microsoft 365 Apps for EnterpriseMicrosoft Office LTSC
Microsoft Word Remote Code Execution Vulnerability
CVSS 3.1
7.8High
Official description
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (microsoft) | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 ≤ v < https://aka.ms/OfficeSecurityReleases | CVEProject cvelistV5 (CNA) |
| Microsoft | Microsoft Office LTSC 2024 | 16.0.0 ≤ v < https://aka.ms/OfficeSecurityReleases | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23657 vendor-advisorypatch
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Details
- Published
- 2026-04-14
- Last updated
- 2026-10-15
- State
- Published
- Assigner (CNA)
- microsoft
Exploit prediction (EPSS)
0.41%
Probability of exploitation in 30 days
35.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-416Use After Free