# CVE-2025-1851: Tenda AC7 SetFirewallCfg formSetFirewallCfg stack-based overflow

- Exploited (CISA KEV): no
- Published: 2025-03-03
- CVSS: 8.7 HIGH (v4.0)
- EPSS: 1.1% (65th percentile)
- CWE: CWE-121, CWE-119

A vulnerability, which was classified as critical, was found in Tenda AC7 up to 15.03.06.44. This affects the function formSetFirewallCfg of the file /goform/SetFirewallCfg. The manipulation of the argument firewallEn leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

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

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2025-04-28 | 56 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2025-04-28 · new · rule 200011099
  > Added: signature 200011099 "Tenda AC7 Buffer Overflow" (Buffer Overflow, risk High), systems: Other Web Server. References: CVE-2025-1851.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2025-05-22 · new · rule 200011099
  > Added: signature 200011099 "Tenda AC7 Buffer Overflow" (Buffer Overflow, risk High), systems: Other Web Server. References: CVE-2025-1851.
  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-2025-1851 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2025-1851