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

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-03 · updated 2026-06-17
Weakness: CWE-119

Description

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.

Affected products

Tenda AC7: before 15.03.06.44 — fixed in 15.03.06.44

How to fix

Upgrade to a fixed version: Tenda AC7 15.03.06.44. Check the vendor advisory for mitigations.

References

https://github.com/Raining-101/IOT_cve/blob/main/ac7_V15.03.06.44_SetFirewallCfg.md
https://vuldb.com/?ctiid.298119
https://vuldb.com/?id.298119
https://vuldb.com/?submit.505271
https://www.tenda.com.cn/
https://github.com/Raining-101/IOT_cve/blob/main/ac7_V15.03.06.44_SetFirewallCfg.md

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