CVE-2026-3679 Tenda FH451 QuickIndex formQuickIndex stack-based overflow
A remote attacker can execute arbitrary code on Tenda FH451 routers via a stack-based buffer overflow in the QuickIndex form.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3679?
CVE-2026-3679 is a high-severity memory corruption vulnerability in Tenda FH451, published on 7 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was identified in Tenda FH451 1.0.0.9. Affected by this vulnerability is the function formQuickIndex of the file /goform/QuickIndex. Such manipulation of the argument mit_linktype/PPPOEPassword leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is publicly available and might be used.
Which versions are affected by CVE-2026-3679?
It affects 1 product.
Products include Tenda F451 Firmware.
How do I fix CVE-2026-3679?
No fix has been published for CVE-2026-3679 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-3679 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3679 exists.
Other vulnerabilities in Tenda FH451
- CVE-2026-6120 Tenda F451 httpd DhcpListClient fromDhcpListClient stack-based overflow
- CVE-2026-6121 Tenda F451 httpd WrlclientSet stack-based overflow
- CVE-2026-6122 Tenda F451 httpd L7Prot frmL7ProtForm stack-based overflow
- CVE-2026-6123 Tenda F451 httpd addressNat fromAddressNat stack-based overflow
- CVE-2026-6124 Tenda F451 httpd SafeMacFilter fromSafeMacFilter stack-based overflow
Sources
Also known as GHSA-f282-6248-c3xx.