# CVE-2023-21716: Microsoft Word Remote Code Execution Vulnerability

- Exploited (CISA KEV): no
- Published: 2023-02-14
- CVSS: 9.8 CRITICAL (v3.1)
- EPSS: 84.8% (100th percentile)
- CWE: CWE-190

Microsoft Word Remote Code Execution Vulnerability

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2023-05-09 | 84 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2023-05-09 · new · rule 200011091
  > Added: signature 200011091 "Microsoft Word RTF Remote Code Execution" (Buffer Overflow, risk High), systems: Microsoft Windows, SharePoint. References: CVE-2023-21716.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2023-21716 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2023-21716