# CVE-2019-10149: Exim Mail Transfer Agent (MTA) Improper Input Validation

- Exploited (CISA KEV): yes, added 2022-01-10
- Published: 2019-06-05
- CVSS: 9 CRITICAL (v3.0)
- EPSS: 100.0% (100th percentile)
- CWE: CWE-78

A flaw was found in Exim versions 4.87 to 4.91 (inclusive). Improper validation of recipient address in deliver_message() function in /src/deliver.c may lead to remote command execution.

## 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 | Before feed history | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

"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-2019-10149 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2019-10149