# CVE-2017-9785: NancyFX NancyFX Framework Up to 2.0.0

- Exploited (CISA KEV): no
- Published: 2017-07-20
- CVSS: not scored
- EPSS: 3.0% (87th percentile)

Csrf.cs in NancyFX Nancy before 1.4.4 and 2.x before 2.0-dangermouse has Remote Code Execution via Deserialization of JSON data in a CSRF Cookie.

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

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | Before feed history | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2023-07-11 | — |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

### F5

- 2023-07-11 · updated · rule 200004365
  > Updated: signature 200004365 "Generic Base64 Encoded ASP.NET Serialized Object" (Server Side Code Injection, risk High), systems: ASP.NET. References: CVE-2017-9785.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2023-08-08 · updated · rule 200004365
  > Updated: signature 200004365 "Generic Base64 Encoded ASP.NET Serialized Object" (Server Side Code Injection, risk High), systems: ASP.NET. References: CVE-2017-9785.
  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-2017-9785 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2017-9785